Well I see that there shouldn't be a whole lot of difference in the types of clothes you wear no matter where you interview. If you are going for a retail job, then there is a bit of leeway. I interviewed one time at a department store and of the 6 of us in the group interview, I think 3 or 4 girls wore jeans. Now in my current job, I've seen quite the range of outfits for people interviewing and because we did open interviews, anybody who was over 18 and filled out an application could interview...one time a lady came in with a shrunken belly shirt, 3/4 sleeve, and then high-waisted jeans. It wasn't fashionable...it was a mid-90's disaster.
Always dress fairly conservatively. Blazer and dress pants are always good, along with a button down shirt. Brooks Brothers and Ann Taylor (and Ann Taylor Loft) are good reference points. Another thing to do would be to do a dressy top underneath. As far as shoes go, a mid-size heel is what I see as appropriate. Too low and it looks too casual, too high and it can sometimes look unprofessional. Keep jewelry to a minimum. The thing that I heard is no rings unless they are wedding rings, one pair of earrings, and a simple necklace. No perfume. If you use any fragrant body care, avoid it that day. Keep makeup VERY minimal. Foundation, concealer, mascara, and a neutral shade of shadow is all you should use. Bring a "smart bag" (what I consider a smart bag is a structured handbag that isn't a "purse" per se...it is in good condition, not slouchy, and can hold resumes and applications).
Also a tip to anyone going out on the job hunt...a truly good candidate will dress up when they are going to get the applications (not too formal, just nicer than a teeshirt and jeans), going to return the applications, and then especially the interview. If I were hiring, I would be a lot less likely to hire somebody who showed up looking all ratty.