Unfortunately I'm speaking from personal experience, do not get her drunk. Chances are she may get with you but only because she's drunk and has lost her inhibitions. It doesn't mean she's gay/bisexual/or interested in you. It could just mean she's drunk and she wants to experiment a little.
I personally think that getting someone drunk so they can pash you/or you can pash them is incredibly immature and very demeaning to the other person. If she wants you, you would want her to want you when she's sober, not when she's drunk.
Does she know you're bi? thejosiekiller has a point, you should find out what she thinks about bisexuals/homosexuals and whether she's interested in experimenting.
Just be careful, because you could ruin a perfectly good friendship, which is what happened in my situation.
(P.S becareful I get jumped on, I'm straight, but I had a bisexual friend after me)