I think only stores that are individually owned would have the option of hanging an artist's work. I haven't had any success with that avenue, myself. I did have a painting displayed in the window of a frame store once, but it didn't bring in any leads. Try some of the other options outlined in the marketing section of this site. Some good methods are donating to very high end auctions, contacting a well known person to do a freebie for them, demonstrating at high end art fairs, etc.