I used to go to BS West all the time. I haven't been lately, but I'm supposed to be going again next week with one of my friends. BS is an alternative bar with a largely male crowd. But you'll find that quite a few girls go too, as well as the occasional transvestite.
It's just such a fun place and I've never had a bad time when I've gone- it's kind of impossible I think. You have the option of hanging out on their patio, in the main bar or going upstairs and they're always playing the best music. They also have TV's all around the bar that play music videos.
The bathrooms are pretty much unisex, so you'll be in there with anyone and everyone, but no one seems to mind. There's a little dance floor too that gets really packed and everyone is just out to have a great time.
One thing I've noticed about BS is that it gets very hot in there. A little air conditioning can go a long way and in the summer, it can get pretty uncomfortable. But other than that, I recommend BS to everyone- any night of the week.