I have been asked for ID when using credit cards for so long, it's second nature; pull out cc, flash the licence along with it, much like buying alcoho - I'm still young enough to get asked .

My options are show my id and take the chance that a $6 an hour clerk will memorize my name, address, dob, height, eye color and weight by looking at my licence for 3 seconds or carry around a large sum of money with me everywhere I go. I'll take my chances with the former.