Well I think I found my idea for the HM for an IASW theme....there's a shirt on etsy that took the "good bye" room, where there are signs that say that in all of the different languages, but they changed it to "run." I just need to make sure that the shirt is suitable fabric to run in....
As far as ideas go for others....there are the gondoliers (there are acutally quite a few characters with horizontally striped shirts that could be super easy), the cowboys, the cancan girls, the hula girls. SOMEONE needs to figure out how to pull off the winking/lazy eyed hippo. The "jungle" room could be an easy way to recycle a Lion King or animal print costume. A cactus playing a guitar?! The tiki-style drummers (especially the one with the weird white/cone shark head.)