Last summer I posted about a day when I wanted to go to the beach and my H grumpily indicated his disinterest and the kids followed suit. I decided that I didn't care. I would prefer my family's company but it was a beautiful day and I was going anyways. One by one they all decided that maybe the beach was a good idea and joined me.
I guess I'm suggesting that you should go ahead and "go to the beach" with or without your H. Do it for your own reasons and don't let it bug you that your H is being a workaholic-party pooper. That's his problem.
P.S.
I would be happy to join you and HP at the beach house. I'll bring my D13 who will gladly babysit all the youngsters in exchange for cash and pizza and then we can all go out dancing at night and show off our fabulous tans. I sometimes think the whole concept of "differentiation" is just a new-fangled way of saying "Living well is the best revenge.".
"Tell me, what is it you plan to do with your one wild and precious life?" - Mary Oliver