I went to buy beer at my local grocery store a couple of years back, but the clerk refused to accept my driver's license because it had a small crack on the edge. I'm also CLEARLY over the age of 21 with grey down to my nose hairs and eyebrows.

Anyway, that was the one and only time I ever used my one of my CCPs for identification purposes. It was my nonresident Utah permit as my state permit doesn't have a picture.