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Regarding various cafes/restaurants, I can say one thing – this will immediately affect the tournament time. Some are used to eating at one time, others at another; some like one cuisine, others like another. There's the time it takes to get to the cafe, the time it takes to decide on an order, the time it takes for it to be brought, and then you see that your neighbor ordered something tastier and you'll want to try that dish too, and so on. In the end, half a day will be spent just on eating. Cooking on-site is the optimal option. Or, if the hosts cook, as happened in Belarus, but it seems that's not the case here.
It's strange that people who have already attended similar events didn't mention this and didn't immediately dismiss the option of going to a cafe.