besides the food (your menu sounds super!) and lots of "big people juice"
as my daughter calls it, DONT FORGET THE CAMERAS!!
my bff had little disposable ones on her tables at her 25th bday/graduation party. the pictures were really relaxed and goofy and fun, and her album of that day looks amazing. combined with the regular digital pics, i think she has close to 250 pics in it.
your "no-kid" rule is wonderful...you may also want some extra blankets in case some of your company overdoes it and cant drive. we always borrow a bunch from my mom, and have a "key bowl/pitcher" monitored by my sister who doesnt drink, and she decides who drives, and who better grab a blanket and find a corner!
