I've been going to Dancetime Studios for a year now and it's rather fun - especially their social nights (Tuesdays). For students, they do an offer for $16 which gives you a 1 hour ballroom lesson, then a 1.5hr social latin class. It's good fun, the staff are friendly. If you're up for learning dance, it's a good place to try. They do lessons as well if you're interested in doing comps and what not, as well as medals.

Approximate cost: $16