Yes, a drink or two after the show sounds great.

This will not be a repeat of the Johnny Mathis concerts for Marian---back at her hotel room at 9:30!
I'm staying at the Premier Travel Inn. Probably others are too. I stayed at one at Gatwick and it was nice and clean, with a good bed. I recall they only have liquid soap and no American washclothes, so I'll bringing a few bars of soap! Also they didn't allow me to check in prior to 14:00, so it's best not to arrive too early! But perhaps you could call ahead and arrange an early check-in.
Full English buffet breakfast is extra (7.50 pounds) but very good ... sorry no bagels and salmon, Edgar. I can already taste the mushrooms, tomatoes, and English bacon! The restaurant has a Beefeater restaurant, and there's The Grapes Pub around the corner. We could go to one of those places. I've never been to an English pub, only to a Welsh pub in Caerphilly for Sunday roast.
I hope many can join us after the show!