There needs to be a button that requests an invite from the host of a room that a friend is in. Right now you have to track down whoever is the room creator in an invite-only room, which makes it difficult to request an invite (especially if you don't have that person friended).
To elaborate, a use case:
Friend #1 is in a room that Non-Friend #1 is hosting/owns, and it is set to invite-only.
I am trying to join on Friend #1. Friend #1 is not the host, so they cannot invite me. I want to press a button on Friend #1's profile that will send an invite request to Non-Friend #1, so if they accept, I can join.