When I was in the 7th and 8th grade, I took ballroom dancing after school from the same teacher whom I had taken tap and jazz from since age 6. We learned the bossa nova along with other standard ballroom dances (cha-cha, waltz, fox trot, mambo, etc.) It was a fun two years.
(Of course, we still ended up doing the twist, pony, etc.) at our school dances and sock hops.