The comedy club in El Paso gives out 2 different braclets (under & over 21).
But I guess if you're military they usually over look what age you are and just let you drink. I have a friend that goes to El Patio (a bar in Mesilla, NM) and he is younger than I am (I turn 21 in like 29? days). Have another friend that has gone, he is 18 still.