JFK D1 Lounge

I have four hours later today (5-9pm) at the lounge, and I’ve never been, I know it’s nice and I’ve read about it…and this may be an incredibly dumb question and I’m ok with that, is there anything I “must” do? A drink to get, a meal, anything at all? Lol

I’m pretty much a lounge virgin, so don’t really know what to expect/do.