[foepys]

While you want something "spur of the moment on a Sunday" others are happy to have a day off where almost all their friends and family do, too.

You are thinking very egoistically. Maybe try working shifts for half a year with only getting to know the schedule 2 weeks before, before you demand that everybody should jump to serve you. Or try to raise a child that has school Mon-Fri while you have to work Sat and Sun from 1pm to 10pm.

Berlin has supermarkets open sometimes even beginning from 6am, and a lot of "Kiosks". It also has a huge demand for programmers and other IT specialists. There is little reason not to move there if being able to buy whatever you like on a Sunday is so important for you. The rent is a lot cheaper, too. If Berlin is not enough, there is also Hamburg with offices from Adobe, Microsoft, Google, etc.