Being "cool guyed" is basically how people who have zero social skills cope with it, by blaming the others instead of recognizing maybe they got "cool guyed" because they walked in and acted like a standoffish weirdo.
When I went to Lotties I could not have looked less "cool". I'm a dorky Canadian walking around in New Balance running shoes, sunburnt as shit and with my girlfriend. Mike was there and was nothing but kind to me, we chatted for a bit, he asked where I was from etc, and at the end ended up giving me a grip of extra stickers with my purchase specifically asking the dude who rang me up to do so. (although I was apparently not cool enough to get to pet his dog)
I realize it's a very small gesture on his part and I'm not trying to act like suddenly I'm in some inner cool guy circle because I am most definitely not. The point I'm making is, if you don't act like a dumbass or someone who looks like they have no interest in speaking, more often than not you will be absolutely fine.