No problem, man - the plugin is still very cool.
In my project the "room joining" process should happen automatically. The user just inputs his name and presses start button. Than he is automatically trasfered to the next available room. If room member limit is reached (in my case it's 2-4 players), the room is automatically closed and the game starts.
But I think I've found the way how to do this without storing anything in hash-tables, just by combing "Lobby" plug for iterating through available rooms with "Bottleneck" for joining the available room.