I really do not like dress up parties primarily because I like to look cute and I want the option to leave a party and go someplace better if its boring. But when I do have to go, I either don't dress up and say that I have a work thing with my husband afterwards or, I find a way to dress up like a hooker or Amy Winehouse because then I can just wear my normal clothes.
I am going to a fun party tomorrow (I can't say whose it is because then all these freaky insecure women will be upset that they weren't invited) but the theme is BLACKOUT - so you wear all black and funky shoes. So I will be wearing a kickass new black dress that I have and check out the shoes - love 'em.
A great idea for halloween parties: just clip some spider pins on some shoes or dangle some from a necklace, do temporary skull tatoos on your arm and then wear a cute black dress. All the women in Flintstone costumes will be super pissed at you but just tell them to look in the mirror.
Happy Halloween - I hope you get some great treats.