Absolutely check out RPU (Rainbow Pride Union), the on-campus GSA-type club. They host lots of events, and they have their own lounge which is a safe space. You'll also see signs with a rainbow triangle on them that have a list of people all over campus who are trained in awareness and sensitivity and such, I forget what the program is called, but their offices are safe spaces.
The majority of students are open-minded and tolerant, and the school definitely has a left-of-center vibe. You certainly don't need to worry about being harassed.