Multiple rooms per user

Should we allow being in more than one room at once? maybe seeing them side by side vertically, maybe in tabs if on mobile?

The idea is that if we do language based for example, I may way to be on both english and spanish, to greet people and stuff (so maybe we should only make it for admins)

but really, why not allow people, lets say you're in a room with people you like, but they aren't talking much, you might still not want to leave it?

So maybe you "try" a new room, knowing that you can always go back to the previous one?
So if we did this we should preserve rooms you're in, and rooms we have in general in the db. Along with a brief history per room so they don't look empty. and if this is in the db we don't waste memory. We just delete old messages after we hit some limit (say 50 per room or something)

Then when people open it again, we show them the rooms they were in, but if everyone is offline in all, we default to a new one that has active people