diff --git a/ui/src/pages/InstanceExperimentalSettings.test.tsx b/ui/src/pages/InstanceExperimentalSettings.test.tsx
index be9a97ed..1c8c77b4 100644
--- a/ui/src/pages/InstanceExperimentalSettings.test.tsx
+++ b/ui/src/pages/InstanceExperimentalSettings.test.tsx
@@ -1,6 +1,5 @@
 // @vitest-environment jsdom
 
-import { act } from "react";
 import { flushSync } from "react-dom";
 import { createRoot, type Root } from "react-dom/client";
 import { QueryClient, QueryClientProvider } from "@tanstack/react-query";
@@ -33,7 +32,7 @@ async function flushReact() {
 const CONFERENCE_TOGGLE_SELECTOR =
   'button[aria-label="Toggle conference room chat experimental setting"]';
 
-describe("InstanceExperimentalSettings — Conference Room Chat card (PAP-137)", () => {
+describe("InstanceExperimentalSettings — Conference Room Chat card (PAP-11233)", () => {
   let container: HTMLDivElement;
   let root: Root | null = null;
 
@@ -71,22 +70,16 @@ describe("InstanceExperimentalSettings — Conference Room Chat card (PAP-137)",
     vi.clearAllMocks();
   });
 
-  it("renders the card with the approved copy, placed right after Streamlined Left Navigation Bar", async () => {
+  it("does not render the Conference Room Chat experimental setting for now", async () => {
     await renderPage();
 
-    expect(container.textContent).toContain("Conference Room Chat");
-    expect(container.textContent).toContain(
-      "Adds a Conference Room — one chat where you and your whole team work together — plus the live activity feed and the redesigned onboarding. Also restyles task threads as chat bubbles. Turn off anytime to restore the classic UI.",
-    );
-
     const headings = [...container.querySelectorAll("section h2")].map((h) => h.textContent);
-    const streamlinedIndex = headings.indexOf("Streamlined Left Navigation Bar");
-    const conferenceIndex = headings.indexOf("Conference Room Chat");
-    expect(streamlinedIndex).toBeGreaterThanOrEqual(0);
-    expect(conferenceIndex).toBe(streamlinedIndex + 1);
+    expect(headings).toContain("Streamlined Left Navigation Bar");
+    expect(headings).not.toContain("Conference Room Chat");
+    expect(container.querySelector(CONFERENCE_TOGGLE_SELECTOR)).toBeNull();
   });
 
-  it("toggle reflects the loaded flag value", async () => {
+  it("does not render the toggle even when the stored flag is currently enabled", async () => {
     mockInstanceSettingsApi.getExperimental.mockResolvedValue({
       enableConferenceRoomChat: true,
       issueGraphLivenessAutoRecoveryLookbackHours: 24,
@@ -94,40 +87,7 @@ describe("InstanceExperimentalSettings — Conference Room Chat card (PAP-137)",
     await renderPage();
 
     const toggle = container.querySelector(CONFERENCE_TOGGLE_SELECTOR);
-    expect(toggle?.getAttribute("aria-checked")).toBe("true");
-  });
-
-  it("clicking the toggle patches enableConferenceRoomChat on", async () => {
-    await renderPage();
-
-    const toggle = container.querySelector<HTMLButtonElement>(CONFERENCE_TOGGLE_SELECTOR);
-    expect(toggle?.getAttribute("aria-checked")).toBe("false");
-
-    await act(async () => {
-      toggle?.click();
-    });
-    await flushReact();
-
-    expect(mockInstanceSettingsApi.updateExperimental).toHaveBeenCalledWith({
-      enableConferenceRoomChat: true,
-    });
-  });
-
-  it("clicking the toggle patches enableConferenceRoomChat off when currently on", async () => {
-    mockInstanceSettingsApi.getExperimental.mockResolvedValue({
-      enableConferenceRoomChat: true,
-      issueGraphLivenessAutoRecoveryLookbackHours: 24,
-    });
-    await renderPage();
-
-    const toggle = container.querySelector<HTMLButtonElement>(CONFERENCE_TOGGLE_SELECTOR);
-    await act(async () => {
-      toggle?.click();
-    });
-    await flushReact();
-
-    expect(mockInstanceSettingsApi.updateExperimental).toHaveBeenCalledWith({
-      enableConferenceRoomChat: false,
-    });
+    expect(toggle).toBeNull();
+    expect(mockInstanceSettingsApi.updateExperimental).not.toHaveBeenCalled();
   });
 });
diff --git a/ui/src/pages/InstanceExperimentalSettings.tsx b/ui/src/pages/InstanceExperimentalSettings.tsx
index da3ccbaf..738c74b8 100644
--- a/ui/src/pages/InstanceExperimentalSettings.tsx
+++ b/ui/src/pages/InstanceExperimentalSettings.tsx
@@ -30,6 +30,9 @@ function formatRecoveryState(state: string) {
   return state.replace(/_/g, " ");
 }
 
+// PAP-11233: keep Conference Room code intact, but hide the user-facing opt-in for now.
+const SHOW_CONFERENCE_ROOM_EXPERIMENTAL_SETTING = false;
+
 function RecoveryPreviewDialog({
   preview,
   open,
@@ -350,28 +353,30 @@ export function InstanceExperimentalSettings() {
         </div>
       </section>
 
-      <section className="rounded-xl border border-border bg-card p-5">
-        <div className="flex items-start justify-between gap-4">
-          <div className="space-y-1.5">
-            <h2 className="text-sm font-semibold">Conference Room Chat</h2>
-            <p className="max-w-2xl text-sm text-muted-foreground">
-              Adds a Conference Room — one chat where you and your whole team work together — plus the live activity
-              feed and the redesigned onboarding. Also restyles task threads as chat bubbles. Turn off anytime to
-              restore the classic UI.
-            </p>
+      {SHOW_CONFERENCE_ROOM_EXPERIMENTAL_SETTING ? (
+        <section className="rounded-xl border border-border bg-card p-5">
+          <div className="flex items-start justify-between gap-4">
+            <div className="space-y-1.5">
+              <h2 className="text-sm font-semibold">Conference Room Chat</h2>
+              <p className="max-w-2xl text-sm text-muted-foreground">
+                Adds a Conference Room — one chat where you and your whole team work together — plus the live activity
+                feed and the redesigned onboarding. Also restyles task threads as chat bubbles. Turn off anytime to
+                restore the classic UI.
+              </p>
+            </div>
+            <ToggleSwitch
+              checked={enableConferenceRoomChat}
+              onCheckedChange={() =>
+                toggleMutation.mutate({
+                  enableConferenceRoomChat: !enableConferenceRoomChat,
+                })
+              }
+              disabled={toggleMutation.isPending}
+              aria-label="Toggle conference room chat experimental setting"
+            />
           </div>
-          <ToggleSwitch
-            checked={enableConferenceRoomChat}
-            onCheckedChange={() =>
-              toggleMutation.mutate({
-                enableConferenceRoomChat: !enableConferenceRoomChat,
-              })
-            }
-            disabled={toggleMutation.isPending}
-            aria-label="Toggle conference room chat experimental setting"
-          />
-        </div>
-      </section>
+        </section>
+      ) : null}
 
       <section className="rounded-xl border border-border bg-card p-5">
         <div className="flex items-start justify-between gap-4">