We did a "pretty in pink" theme where we watched the movie but decorated the whole house in pink balloons, with pink food & drink (cookies & punch)! It was super cute!

Another possibility is the "Breakfast Club" where you watch the movie and our chef made lots of yummy breakfast food like bacon (my chapter loves bacon! lol!).
Those might be a bit long if the parties can only be a certain length of time. Another good party that worked was casino night where we rented tables and all dressed like Vegas dealers (black pants with a white shirt). It was a lot of fun and you could make psuedo-martinis (sprite & the green marischino cherries).
PM me if you need more ideas, I have a TON of them!