Well, for a theme how about 80's disco. This should work well if every one is in florescents :). Also my aunty used to throw the best party games so here are a few of my favourites.
1) the malteaser game:- in groups of 4-5 each person has a straw, a plastic drinks cup and infront of them shold be a plate full of malteasers (2 or 3 bags worth. ) each person takes it in turns to role the dice, only when a person roles a six are they allowed to pick up their straw and suck up as many malteasers as they can. Each malteaser collected should be placed in the individuals cup. They can keep
Collecting malteasers until somebody else
Rolls a six. The first person to fill thier cup wins.
2) the polo game:- again in teams, each person has a tooth pick, standing in a line behin one another, the aim is to pass the polo from one team member to the next and back again without dropping it on the floor. The catch is that the tooth picka have to be in the team members mouths and the polo passed from tooth pick too tooth pick!!! First team too do it successfully wins!!!
3) gloved pass the parcel:- simple, pass the parcel but only when the music stops, the person holding it must put a pair of socks on their hands and try to remove a layer before the music starts again!!
Hope this helps x