Wow I never thought about that way, that is great advice. don't you need a dancing partner to start salsa classes? Or I can show up and they assign a dancing partner.
In a lot of salsa classes it's perfectly fine to show up and they will assign you a partner.
Often they also rotate the partners so that everyone guy dances some time with every girl in the class.
At best you Google for local Salsa classes. It's probably specifically written on their homepage whether you need a partner. If it isn't, sent them a mail and they will tell you.