Being that rooms are stored via npub, and currently held in a single-file list, I think it would be most beneficial to users to offer an icon somewhere indicating whether the room is public or private. Users may not always remember to check the settings before opening up an old room, and they may not think to see if their room appears on the home page either. Having a visual cue within the room, especially a high contrast (such as black/white, or an icon of a ghost/ostrich to indicate private or public, respectively) may help users from accidentally lingering within a private room.
This same indicator could also be referenced under 'My Rooms'.
If the user has visited a private room, these rooms could also be listed on the main page, beneath open rooms, if they are currently open. This indicator, in conjunction with a separated section, would give a clear indication of which private rooms are currently available, and give the user a more refined sense of when a room is private or public.
An idea for the UI element of this could be an open/closed eyeball in a recognizable position amongst various elements such as:
- listed rooms (on both main page and under 'my rooms')
- title bar of each room
- separate section beneath public rooms for private rooms (indicator icon could be used in the header of both public and private rooms, to assist the user in translating the icon to its meaning quickly)
- could also offer a separate section under 'my rooms' for private rooms, following the above theme
Example icons:

Being that rooms are stored via npub, and currently held in a single-file list, I think it would be most beneficial to users to offer an icon somewhere indicating whether the room is public or private. Users may not always remember to check the settings before opening up an old room, and they may not think to see if their room appears on the home page either. Having a visual cue within the room, especially a high contrast (such as black/white, or an icon of a ghost/ostrich to indicate private or public, respectively) may help users from accidentally lingering within a private room.
This same indicator could also be referenced under 'My Rooms'.
If the user has visited a private room, these rooms could also be listed on the main page, beneath open rooms, if they are currently open. This indicator, in conjunction with a separated section, would give a clear indication of which private rooms are currently available, and give the user a more refined sense of when a room is private or public.
An idea for the UI element of this could be an open/closed eyeball in a recognizable position amongst various elements such as:
Example icons: