There's a chance I could be a lesbian. I've never dated a women and none of my heterosexual relationships seemed to click--they've seemed to be more awkward than anything else. I like to keep discretion about my personal life, and wouldn't mind going to a gay bar: not necessarily to "pick up a woman," but more so to be in a situation where I'm talking with other women who I know for sure have an interest in women also to see if there's a "spark" or not. I don't know any lesbians and there wouldn't be a connection between my female friends who I know are heterosexual. I've been to general bars and there's alot of drunk,creepy men hitting on me. It would be refreshing also to have the conversation with guys who are just not out to be hitting on all the ladies in the bar.
Yes, I'd be careful at the bar: getting crazy drunk, don't leave your drink unattended, accepting drinks you haven't seen poured, drinking and driving and so on. I'm of legal age and I've been to bars before--just never a gay-themed bar.
I don't know what's going on with women but I guess I can sort of understand it will all the male jerks around but it appears to me that half the females on campus are as much into girls as guys.
I would suggest that you be patient, open minded and open eyed.