We also eat primarily in the kitchen and dining room (not a separate room, our kitchen and living room are open plan and there is a space for a dinner table that is not technically kitchen or living room).
Eating in the living room doesn't happen much. The kids can have a rare snack in there if we're watching TV, but meals are always at the table. The exception is DH who eats his lunch at his home office desk, which happens to be in our bedroom for the time being. I sometimes have chocolate from my stash in my bedroom, but that's mainly to hide it from the kids (and DH) - generally I don't like eating in bed. As for drinks, DH and I take our drinks with us to any room (except bathroom), DD is allowed to have a water bottle in her room, DS is still too young.