At a random bar/brewery in town for several hours. It happens to be near the highest end hotel around. I guess he approached her older lady hang out group that occasionally goes out to dinner and drinks and in this case to see a live band. They didn't know who he was (hell I don't, I had to google him) which I assume was the attraction for him. He danced and drank with them for a few hours.
The next day he tweeted thanking the ladies at such and such bar for the good time and eventually via the power of the Internet someone involved's daughter figured out it was them and let them know they hung out with a famous guy much to thier amusement. Guess he was since regular dude.