If you're a waiter or waitress in Boston, here's something to smile about. 

A Zagat survey has found the city with the highest reported tipping average to be Beantown at 20%. 

The city with the least generous tippers in the U.S. is San Antonio, Texas, at 17.1%. The national reported average tip is 18.9%. 

New York City is known as the priciest city for dining out with a reported spending average of $48.44 for dinner -- that's $12.14 over the national average of $36.30. If you're interested in cheap eats, the two least expensive U.S. dining cities are Detroit ($28.77) and Minneapolis ($29.67).

And, what about trendy foods? Sriracha is the most popular with 31% of surveyors responding that they "love" the spicy condiment. 

When it comes to cuisines, Italian food is the most popular with 22% of surveyors calling it their favorite.