How legalized sports betting has transformed the fan experience

A couple of days before Christmas, I went to see the NHL's Nashville Predators play on their home ice against the defending Stanley Cup champion Colorado Avalanche.

Amid all the silliness of a modern pro sports experience - the home team skating out of a giant saber-toothed tiger head, the mistletoe kiss cam, a small rock band playing seasonal hits between periods - there was a steady stream of advertising for