Double Zero, Unless he has a very good flexible friend, he may not repeat the offer.
Assume average round = £10 X 5000 = £50k !
I always found the USN to be VERY well behaved when on a run ashore. Jack could learn a lot from them, but I suspect recruitment would suffer if the RN adopted the same rules. RN cocktail parties are still the best. I met ex Mrs Navaleye on one when Cardiff airport got the call to send over some skirt when we were in Cardiff Bay. We had 5 grossly over weight WRENS with unusual body odour problems on board when the check-in team from CWL arrived on a coach still in uniform. Ah happy days...
I still have a fondness for "Valley girls"