Is there a way to limit the use of certain events to room members only? I don't need to limit to a specific room, but need to make sure the client has joined a room before the event is available for their use.
No, this isn't available, but you can easily get the list of rooms your client is in with the rooms() function. So you can do something like this:
@socketio.on('foo')
def my_foo_event(data):
if 'required_room' not in rooms():
return # or return an error event, etc.
# handle the event here