Summer Art Courses Long Island:
Check out the links below for local places that offer art classes. I have never taken a class at these places, but I have heard they offer great courses.
Check out ArtsAliveLI for classes around L.I.
The Drawing Studio (Smithtown)
Art League (Dix Hills)
Long Island Academy of Fine Art (Glen Cove)
Studio E (Miller Place)
East End Arts Council (Riverhead)
Creative Art Space for Kids (Lynbrook)