Knowledge: Bli, a langauge school, offers online classes and it is a lot of fun. On the other hand, salsa dance courses can be found easily on YouTube for free.

Conversation:
I love salsa dancing for exercise. It works up a sweat!
Nice! Salsa has it's origins in the Caribbean.
It's a lot of fun. Is there online classes I can take?

Response: Oh sure. You can take online classes on YouTube.