And before anyone gets angry I DON'T think that these are necesarily common, but you know, snobby people do, like:

Watching ITV
Shopping in ASDA
Taking your top off in a pub garden in the summer
Having a fairy at the top of the Christmas tree (my Mum said this was common for some reason)
You've Been Framed
JJ Sports
Sports Bars
Smoking in bed

Um, now you... (here comes a zero replies)