Moving the topic slightly off kilter, when i used to play in a few of the underground rooms in NYC one of the rooms was called the National Poker Room. It lasted about 2-3 months as many of the rooms do but they used the ultimate generic chips --- http://www.apachepokerchips.com/nationalpokerseries.html

The room didn't last long but and they never used more than the $5 but still leaves a lot of room for issues.