This depends on the particular school/college and its ethos, but generally speaking you need to show a degree of caution about dancing too wild and weird. Originally, proms were ultra conventional but things are looser now. Salsa has its origins in the Puerto Rico Bomba, but has elements of Mamba and others.
Popular showings can be quite extreme. Overly sexy dancing won't be acceptable, but salsa doesn't have to be like this.You can see a good demo on youtube (salsa dancing in Miami) which is skilful and elegant but not sexy. Make sure you know the foot movements well. Nothing worse than trying something complex and making a mess of it.
