I figured a majority of PCFers provided something to eat based on the 25 glorious pages in the hot dog roller pr0n thread
To the original question, I don't go to another game expecting a meal, unless the host announces there is food. I think "depends" also plays a large role, especially based on time of the game and duration. But if I know it's a long night/early morning game and there's no food, I will bring my own snacks because I know I'll eventually get hungry after midnight or so.
As for me, I host a Saturday afternoon non-raked game, which typically goes 7-9 hours, so folk coming to my game know they will be fed. They're aware in advance via texts on what the meal for the game is, and the food, non-alcoholic drinks, snacks are always on me (BYOB). I incorporate a 30-minute lunch break away from my degen room, which has a strict no eating policy, and folks eat in my dining room and living room. After the meal, I remind folks about washing their hands before they even think of returning to the table.