>>293402964
Just join them. Green status/ Blue status is for sure ok to join.
Orange is probably lewding so ask to join as well, the more the merrier.
Red status is impossible to join anyways.

Friends+ means it's definitely ok to join them
Public too
Friends only is usually used only when sleeping
Invite is a weird territory. Usually not a good idea to ask but if you really want to, they won't be mad if you send a req inv.