I agree with the award for best selection, but I would challenge this as the best house marg in the denver Metro area. The Rio not only has a strong marg, it's a damn tasy one, also Tequilas in Arvada has a house marg that dances circles around Mezcals, along with the Dixons/Goodfriends/Racines Marg- I LOVE margaritas! And Mezcals house marg isn't bad, but it is far from the best.
Best Margarita Denver 2007 - Mezcal
Readers' Choice: Rio Grande
We tried. While our tequila-snob friends sipped at their Coin-style marg, we knocked back every house margarita we could find. We sucked down so many that our teeth started squeaking from all the sweet and sour. And again and again, we kept coming back to those palate-cleansing house margs mixed up at Mezcal. Rather than try to cover up a bad tequila with a worse mix, Mezcal starts with fresh-squeezed juice, pours in (generously) 100 percent agave 30-30 Blanco, then adds a spritz of carbonation to brighten the drink. Served in a pint glass, it's a real deal at happy hour, when it costs only $4, but even at the standard $6, it's the best margarita in town.