are you referring to the "aviators lounge" in the ua terminal? if so, it's always best cup of coffee i have at den and you get in and out privileges with your receipt ^. if i have time (i.e. a nice long layover) i will order a coffee and keep the rep't but if not, i'll simply give the waiter/waitress $2-$3 saying "keep it, i just need a smoke before i head to my gate"