Man I'm way behind! when did Detroit become a state? [/sarcasm]I am voting for detroit, not just because it's a neighboring state of mine, but because it's pretty much the center of the U.S. , it's relatively cheap (definitely cheaper than NY.), and it doesn't get that hot in august the average temperature July-August is 71.
While it obviously doesn't have as much to do as NY or DC, it is the optimal place for people who would just be going for the tournament because of the points I made before.
EDIT: I vote for anywhere in the center (or mid-north) of the united states.