[smickie]

This was my thought too, hand out a set of discount cards (or passbook barcodes) with a moving window from 11:30 to 1:30 on them. If someone doesn't like their time frame, they could swap it with a different employee.

...there's almost an app in there somewhere.

[nraynaud]

I don't like pre-planned organization, it adds cruft. Maybe just do a "current discount" depending on the people in the line, and put it on a mobile website ?