How cool! I also grocery shop on my bike. The clerks always want to know if I rode my bike and how do I want them bagged for that. I bought a 1976 Schwinn Suburban for $25, put my Trek grocery panniers on it and I guess you know that you can get a lot into your panniers! Upright, women's, so I can even ride in a skirt to the store from school. (with shorts under of course). Got that idea from Xeney. Heavy as all get-out, but I figure it's more exercise if I have to work a little harder.
I find that everyone smiles, honks and waves, too.