How is it possible no one made a hot-or-not site just for Halloween costumes until now? Sign into Costume Mash with Facebook and either upload your own costume photo or start voting on which of two Halloween costume photos you like better. The percentage of votes your choice received is in the top-right corner. The leaderboard is not finished yet (and we imagine it won't be done before the holiday is over).
If you only want to rate the ladies' outfits, be aware that you'll see some cleavage, not quite NSFW but close.
The site is a "Halloweekend Hack" from Grouper, a social club that matches groups of strangers in New York City based on age and interest. Grouper co-founder Michael Waxman posted the site to Hacker News this morning. [ It's only slightly annoying that you'll get pop-ups inviting you to check out Grouper and asking you to invite five friends to play in friends mode. ]
Michael Galpert, a co-founder of creative web/mobile toolmaker Aviary and a mentor with TechStars New York, appears to have been involved as well. We've contacted both Michaels for comment.
Check out more Halloween tech coverage from LAUNCH:
Incredibooth Helps You Get Your Spook on with New Theme
Google Gets Spooky, Adds Creative Image Editing Kit
Rep Tech on Halloween with DSLR, iPhone, iPad and Angry Birds Costumes
Email: michael at waxman dot me
Email: mgalpert at gmail dot com