hmm..... i'm not sure if you're events could be alcohol related... b/c we mixed with some fraternities and sports teams where we didn't know anyone- we would do marraige mixers- beer pong tournys or the best one i can think of is a graffiti mixer- where everyone wears white t-shirts (girls- cut them up cute!) and pass out sharpie markers and highlighters- it feel weird at first- but once everyone starts drinking- everyone starts writing all over each other- its sooo much fun- everyone still has their t-shirts and then each person you write on has a story to tell- and when you see them out the next time- you know them... as far as... non alcohol related... hmm i would definately set up sports teams- a guy/girl combo or something.... hmmm maybe set up a board game night where the games have teams and their is a mix of guys/girls- make sure the girls know to mingle and try hard at it- guys are stupid sometimes
lol- good luck!! and have fun!