I wouldn't fret about the music and being a bass. Almost our entire cast was female. That's right, female gang members. I was one of them (Tiger). It was a great and moving musical though, no doubt. Just, at the risk of sounding corny, play it cool. Maybe attempt a NY accent? Rock the fight/death scene. I feel that ours' was a little lame. I'm sure everything will go fine, and congratulations.