Also, you need to understand the codes in the City. while paintball is popular in the outerboroughs and the suburbs, Manhattan has no actual paintball fields. Also, gun control is very strict. They recently passed a law banning toy guns because kids were flashing them on the street and getting shot by cops. Throw in the recent events and terorism alerts, a bunch of people marching around with paintball guns won't be too accepted.
If the Super 7 is in Madison Square Garden or Chelsea Piers (the only 2 places in Manhattan it could realistically be held), then people will need to know the regulations about carrying their gear in advance so they can plan accordingly.
I think however, it should be held in Giant Stadium. The big problem there, however, is transportation. Its in a swamp in the middle of nowhere.