Let me temper the following argument with a comment: When they get down to it, they're going to look primarily at the numbers.
That being said, I think admission committee will absolutely look at your employment in the interim. Try to get a real gig. I understand the economy is tough right now and if you can only end up doing retail, try to see if you can get some sort of volunteer experience working for a campaign or interning with a senator or representative, or helping out at a law firm. It'll help you build connections, and also will make you stand out a bit.
Retail is boring. It doesn't show any of the things that they're looking for in a law student.
Joe Job > No Job, but dig deep. Hell, it will be good networking experience, which is one skill that way too many students graduate not having developed and it will absolutely help you when you're job searching for real in a few years.