I was open-carrying for the past 2 months, trying to break in a new leather holster for my Ruger Alaskin. I forgot I had it on when we went into our local pizza parlor. The waitress brought over a free slice. I asked why, then she pointed to the Alaskin and said her boss liked it.
I did a little research, and found out it is becoming a fad (going viral?) to offer discounts to customers who legally carry.