BD, Bluecoats, last year especially, in 08 the Cadets for more than a few around me...and 06 too.
but I do know many older fans that don't "get it" after multiple viewings, and even some my age, and they get tired of hearing people say "you should learn about it before you go".
They just want to go, be entertained and go home, not do homework before to make sure they "get it"