I can commiserate fully with this, and I can ever offer a potential (limited) solution.

Shop at a 24-hour store.

My local Asda is open 24hrs, and there is no greater pleasure than meandering round at 1 a.m., stopping randomly, at times for no other reason than you can. Admittedly you do have to negotiate round the shelf stacking staff and some stray cardboard boxes, but that just makes it seem kinda edgy and deviant, like you are sneaking round the shop illicitly.

Or maybe I need to get out more.

Aside: How many other people grew up wanting to play Tig in a closed supermarket?