I noticed when I walked into the local Wal Mart, the greeter was projecting a "happy to see you" attitude and welcomed me in. As I was leaving after having checked out there was a WalMart employee sitting in a chair in the airlock. She saw an older black guy walking ahead of me and made a derogatory remark to him. He ducked his head and began to walk faster towards the exit. She chuckled out loud so the girl standing next to her could hear, and she said "watch him run" with a callousness in her voice.
You get a grin coming in and a kick in the butt going out.