It goes without saying that you should play New Jersey bands for both the Jets and the Giants, since both of those teams are based in New Jersey.
The question is whether you need to find East Rutherford and Florham Park bands. If the false "New York" in the team names refers to New York state, I think you can go Jersey-wide, but if it refers to the city it might be cheating to then have an entire state to choose from. I don't think you can jump from city to state.
Similarly, the Patriots have all of New England to choose from, not just Foxborough, because of how they bill themselves. But because the team is the *Washington* Redskins but they really don't play in Washington, for consistency, if you go with New Jersey bands for the Jets and Giants you need to find a band from Landover, MD. Maybe some Dischord band is from there, or, since every Dead show is unique, you could stretch a point and play something from Dick's Picks Vol. 20.
(Note: If they were called the "District of Columbia Redskins" you'd be justified in going Maryland-wide, since historically though not today, the District of Columbia was a larger unit and the city of Washington was just part of it. Georgetown, the County of Washington, the City of Washington, Alexandria County (today Arlington county, now in Virginia), and the City of Alexandria (now part of Virginia, and since grown past its historic boundaries to include territory that was never part of DC) are all historic sub-divisions of the District of Columbia.)
For Denver, you could go with DeVotchKa instead of Dressy Bessy.
