What type of dance is good for being in musicals?

The dance studio around here has decided to offer teen beginner classes. Me and my friend are debating between the jazz/hip hop and the tap/irish step classes (there aren't any single classes and we can't switch the combinations) but we want to do jazz but not hip hop, and we want to do tap but not irish step (but we would suck it up when we decide). Which would be more beneficial for being in musicals? It also would be helpful if someone explained irish step and hip hop more thoroughly. thank you