[GTL]

simple syrup is sugar and water. you should be able to handle it. only liquor you're missing for simple mixed drinks is tequilla and gin which aren't necessarily needed. i would suggest making kamikaze's or something like that if people are into shots. also get some tonic water and limes for vodka or gin and tonic. cranberry juice, and oj. and you're set. if you want to do some fancy girly "martini's". you can get apple or melon licquor and just mix those with vodka. otherwise, you're all set.

unless you want to do margarita's in which case you would want tequila and contreau or triple sec. those are easy, and the best margarita's are with fresh lime juice, although girls would probably like frozen blended ones better.