I am having a combined 16th birthday party with 2 of my best friends. We have several theme ideas we're still considering.

Themes:
-Black and white semi-formal (we wear colored dressed to stand out)
-Mod
-60's, 70's or 80's
-Old Hollywood
-Masquerade
-Mardi Gras

What's your favorite?

Anyways, we're on a budget and none of us really like dancing (maybe 30-40 people co-ed btw) and I don't want to just have everyone standing around talking, eating, and listening to music. We're trying to get a local band to play, but we need something to take up our time. Also, how long do you think our party should last? What are some activities and games we could do to make the party actually enjoyable?

Here's what I've thought of so far:
-disposable cameras on the tables for people to use
-chocolate fountain w/ fondue
-twister/suck and blow/neck ball
-candle lighting ceremony
-henna tattoo artist
-palm/psychic/tarot reader

You like? Share thoughts/opinions please.