So, in addition to needing a meeting room, those 12 friends all need bedrooms. I realized that this particular section of my Forlorne Metropolis base in my main game was just the right size to fit 12 5x5 rooms and 2 3x3 bathrooms (given how rare it is for these guys to all be in the same area at the same time, I promise, two bathrooms is enough), so... I got to work.
I think the hardest part was finding clothes for all of the mannequins that suited the characters. There are a few mannequins I'm not happy with, but I've spent enough hours on this random side-project than necessary already, so... š¤·