Viking Theme Party HELP WITH PARTY THEME!?

HELP WITH PARTY THEME!? - viking theme party

Well, basically, my friend and I are a party .. and though we have two problems:
in the world "and" Zoo "
So, for "everyone", we thought people could .. as a Hawaiian hula girl dress .. .. Bellydance animals .. all .. Viking dancer or circus .. Literally, none of the world! to me other things that people might like dress?
Zoo and we thought all the animals in the zoo and the people were normal, as the nursing staff dress as well?

You can think of something really good, ideas or just ideas for all that everything would be great! : D Thanks!