Unfortunately, all the edible food at grocery stores gets taken to the food bank.

Large grocers have Garbage’s that are not accessible from the outside, but the only food they throw in there is from the hot bars.

Your best bet is trying at a local health food store, if they have a hot bar or deli counter. Their dump times are between 2-3 and around 7:30-8 (food must be dumped after sitting in hot plates for four hours, assume the hot bar opens at 10 and closes at 7).