I certainly don't and the shoe shops that I go to have that rather nasty box of pop socks that they offer you if you turn up in bare feet...I don't use those either.
Very unhygienic! Shoe shops used to provide socks but I suppose Market traders won't bother or do they? Shoes are so expensive that some people will be glad to buy them from a market stall,MR
If shopping for shoes/boots I take a pair of socks in my bag to put on before I try the shoes - I hate to think who else has had the dirty feet in them though =(