Which is correct? Or am I misinterpreting?
If you could get a large enough population involved, you ought to be able to make this work in small towns in Ohio as well; however, you've got to produce a service that's got the wide appeal that Facebook does, not something that appeals primarily to 20-something technorati singles.
Visualization: Guy-to-girl ratio of foursquare/gowalla/facebook checkins for every bar, restaurant and other random location in SF/NYC frequented by foursquare/gowalla/facebook places users who remember to check in.
There are so many baises in there about the only solid fact you can take away from any of this is the relative popularity of locations with people who feel the need to broadcast their location.
In other words, if 2/3 of SF's Foursquare users are female and 2/3 of a particular SF bar's Foursquare users are female:
1) It's true that the guy/gal ratio is 2:1, but
2) It's also true that there is no enrichment of women at this bar relative to the null expectation.
Edit: A collection of presumably neutral places (e.g., Bay Bridge) might help achieve such an estimate.
all percentages shown are deviations from our calculated average per city, so there is an average of about 2 male checkins per 1 female checkin in SF. hope that clears it up a bit!
Or for that guys are more likely to want to check in and advertise that they're at a bar rather than a beauty shop, or even a coffeehouse? And vice versa?
Now, so long as everyone realizes the 'woman at the bar' scene in A Beautiful Mind isn't actual game theory, feel free to go nuts.
Right now, the #1 highest female ratio is showing up as... 1887%. Without making a dumb joke about how your math may be off (duh), I will say this: from a business perspective, if you're going to err on one side or the other, it may as well be this one. Haha.
Please do Austin. :)
While I can't use this myself it's definitely helping a friend make plans for the near future.