When I saw the concept art picture of a armored man, sitting across from a woman sitting in the post-war bar or something, with assorted bottles of nuka-cola and gamma gulp on the shelves, I was given the idea.
I was thinking you would add 'hardcoe' servers of worlds or something, ever since you added it in Fallout: New Vegas.
In these diners, or bars, as I was thinking, you would pay for a meal and sit down at a table and eat it, while talking to friends. The player character wouldn't take excruciatingly long, but a bit of a sit to wait to encourage people to socialize while they are eating, and maybe to stay longer just to talk, adding a new element to the game. If roleplay-specific servers are added, I'm sure this would have even more of a purpose.