Re: Before 7:34pm.
Jason will show up because he's got friends there, and he likes fire. Yeah, it's ironic, and he knows it. He might have had a beer, but probably focused more on free food.
Cloud might go if Tifa or someone he knows talk him into it. He doesn't like fire that much, or social occasions outside of his immediate circle of family and friends, but he also can't so no to Tifa, and has a hard time saying no to people who are persuasive.
Laura would go if Clint and/or a friend from the Avengers talks her into it. Maybe with the kids, maybe without? IDK! Depends on who got her to come along and why/how.
Luke would attend if talked into it by any of the Star Wars folks he knows.