I may or may not intentionally try to schedule my layovers in Las Vegas just for these gourmet chocolates. Regardless, I manage to always stop by this place whenever I have a layover at this airport.
I recommend trying the toffee chocolates, the dark sea salt caramels, and the fruit truffles. They can get a little pricey after you order a few, at $2 each but they're well worth it.
So, after you win a bunch of money from the slot machines in the airport, head on over to Ethel M Chocolates and splurge. Go into a chocolate coma. That is all.