Newsweek has mapped the most fun cities in the United States, according to a new report from WalletHub.

What does "sinfulness" mean in modern America, and how does indulgence vary across the country? A new map shows the country's most sinful cities.

Given this truism, it's no wonder that the populations of America's so-called superstar cities have stagnated while the Sun Belt's metropolitan areas have boomed. When a city — or, as in the ...