Are you interested?
How do you say "Are you interested'" or "Does this interest you'" in casual Argentine Spanish? How about "Vos sos interesado'" I don't know how to do the beginning question mark here...
How about, "¿Te interesa'" or "¿Estás interesado(a)'" "Sos" comes from "ser" so it couldn't be used in this context.
I don't know about in Argentina, but since no one has answered, I'll tell you how it might be said in Mexico, and you can go from there.
I'm going to see a movie. Are you interested?
Voy al cine. ¿Te interesa'