While I'm aware it's not universal, the 4th of July is a pretty big event in my country on this planet, and we usually celebrate it with a bbq, party, and fireworks (at night). Seeing as we have that new patio with a grill, I think it would be a wonderful use of the area. Naturally, everyone would be invited to join the festivities. Would anyone be interested in doing something like a potluck?
[Marvel except Steve Rogers] And we could also do something for Steve, assuming it's his birthday in his universe too.