Scene: The dining room of an international hotel/restaurant chain with an adequate wine list. The first course has been served and half eaten, but there is no sign of the wine. An enquiry elicits the response that they can't find anything to open the bottle with. Grumppa's trusty Swiss Army knife saves the day.
I know I'm spending a weekend in the Midlands, but this is ridiculous.
If going to the same restaurant grumpa, incidentally! that's what our GDs call DH, anyway, I would be tempted to offer the use of my own corkscrew or place it on the table, should they need it. Hoping of course they see the funny side of your offer. Bon apetit.