When people talk about the fun cities in America, places like New York, Chicago, LA, Las Vegas, and Orlando likely come to mind. Some might even include Nashville in that list. Well, WalletHub has done a study comparing 180 U.S. cities to determine their fun factor. And it’s not just counting how many bars, casinos, or amusement parks you have. WalletHub ranked the cities on 65 different metrics. It will come as little surprise that Las Vegas and Orlando rank number one and number two. But the ranking for other cities, including Nashville, might surprise you…