I'm not sure i follow the issue with eating?
I've certainly never gone hungry. Nor needed to carry snacks in my bag when on any city holiday!
We generally have breakfast in the hotel or if in an apartment dh loves to scout the best bakeries & head off for a morning stroll & come back with pastries / bread / coffee & juice which we eat companionably reading our books.
Then we make a plan for the day. Depending where we are & who is with us (dc etc) we might go our separate ways for a few hours. Or we might have plans to go to a particular place together
We stop whenever we feel like it along the way for coffee/ snacks / ice cream/ beer or wine / water
Depending on what we've had for breakfast & what our dinner plans are we usually have lunch, often a fresh salad. We eat lighter during the day as we love a nice dinner in the evening
We always have dinner & i love to do all the research & have places booked. We'll usually try the local specialities in terms of food & drink.
We love a pre dinner aperitif & we spot places on our travels to come back to later in the evening
We always go for a post dinner drink. If the weather is nice we'll sit out. But we do lots of winter travel too & love a good cozy bar too
We don't run out of things to talk about. I find when I travel with friends I end up more tired & it's the constant company & talking. I just don't get that with dh