Trader
Agree 100%. Have stayed in Chicago on a freighter trip and shocked to find out room service not 24hrs. I wasn't prepared to eat self prepared microwavable meals that were provided in the shop next to reception.
AirTaxiDriver
"..most of the time impossible to pay for a normal dish + bottle of still water.."
No, it isn't. Most of the time, if not all of the time, it is possible. Maybe you need to be honest with yourself. Are you seriously telling us that you're out of pocket on most layovers? You need to start bidding for Singapore, Vienna, Manchester and a few others that give you lounge access where you can fill your face for free.