Put data behind those girl-to--guy ratio complaints with Ratio Finder, a site that scrapes Foursquare and tells you where the (social media-savvy) ladies (and gents) at.

Some surprises:
Bourbon & Branch: 23% more guys than girls
Bus Stop: 3% more girls than guys

Some givens:
Grumpy's American Pub: 15% more girls (Grumpy's is also known as William-Sonoma's cafeteria)
Zeitgeist: 29% more guys

Check how your favorite spots weigh in here. Lots of blue (which is for guys) in bars and clubs and lots of pink (which is for girls) in markets and parks.