New Yorkers are stingy with their cabbies (though not quite as stingy as their neighbors in New Jersey). Indeed, New Yorkers are among the worst tippers in the country in a number of categories — but not when it comes to personal hygiene. For some reason, a visit to the barber or stylist inspires generosity in the Empire State. Folks in Seattle and Portland reserve that same kind of giving spirit, no surprise, for their baristas, and Floridians and Texas extend it to their bartenders.

The observations derive from tipping data collected for FORTUNE by Square, the San Francisco-based mobile payments company, whose smartphone and tablet credit card readers have become a feature of thousands of small businesses across the country.

Interestingly, some tipping trends are fairly uniform across the country. Beauty and personal care professionals tend to receive the biggest tips — on average closer to 20% than to 15%. Taxis and limousines skew lower, with average tips below 16% in many states. Tips at restaurant bars show the most variability, with New York fast-food joints receiving an average of 14.77% and bars and lounges in Texas getting 19.66%.

Now if someone can explain why taxis in Wisconsin get such high tips, or why beauty salons in Indiana and many Southern states such low ones, well, that’s what the comments section is for.