Have you ever been somewhere really posh?

I once went with a group of people to a posh store in Piccadilly Circus called Fortnam and Masons and the lady leading the group seemed more embarred being there than people like me although I did feel out of place in a posh store and trying to find people who were not smartly dressed and hardly saw any. We were all glad when we left the store as we felt people visiting there looked down on us. We weren't even scruffy looking just wearing normal casual clothes. But we feared they were looking as we were rather paranoid about it. I thought Harrods all is forgiven at least I feel more equal in that store as any cl of people don't usually get stared at there.