I never heard of Playdium, but it sounds like a really catchy name. Here in Southern California, we are plagued with Gameworks and Dave & Buster's. They use a nice blend of VRs, regular simulators, and alcohol. Some venues even have pool tables and other forms of fun. I think the smaller gaming zones are becoming wiped clean by the newer, larger, monopolizing entertainment centers.
Of course, my favorite place is still my local nickel arcade! With a $1.95 cover charge and most games being 2-4 nickels, you just can't beat that. They even seem to get their hands on many imported arcade systems. Plus, the older games are still in the back and run for free.