So, metro areas with NFL stadia. WashDC and Baltimore probably aren't the safest places, but I'm not sure Philadelphia and Atlanta are much better (folks living near there are welcome to adjust my attitude,
). "San Francisco/Santa Clara" means the stadium used by the SF 49ers, which is located in Santa Clara (~1 hour drive from SF). It's a nice modern facility, but access and parking
SUCK! If, for some reason, I went to a 49ers game I'd either take Light Rail and walk a mile or two from the station or park a mile or two away and use the San Tomas Aquino Creek trail to walk to the stadium.