pics of the inside of the hotel look pretty good, but it's not in the best neighborhood. this part of Market Street gets pretty interesting late at night, but not extremely unsafe. just be aware of your surroundings, use your street smarts, and if you're walking back and forth to the BGCC stay on Market St. You'll definitely want to avoid Turk Street late at night, which is only a couple of blocks away from your hotel.
not trying to scare you at all, just passing on some friendly advice. on the whole, the "bad" parts of San Francisco aren't that bad at all. i walk this area of SF late at night when i go to shows and have never had a problem.