PWG in a different building just wouldn't feel like PWG. Their armory is part of the charm. Also I'm not sure I've ever seen people chalk up PWG drawing 400 people as impressive. It's never been the number of people, but the people it draws.
There's no lack of celebs in LA. There's tens of thousands and you know if a celeb wants to come, PWG's gonna bend over backwards to get them in. Everyone in LA sees celebs at some point. Now there's a lack of celebs in the middle of PA here or in Alabama and drawing celebs in those places would be impressive.