Keith Moon's birthday was on the 23rd of August, and it seems that the Swedish hotels were lucky that Keith Moon didn't decide to celebrate his birthday until the 25th after their second KB gig. The "birthday party" at Sheraton hotel in Copenhagen evolved into one of the most "fantastic" (horrifying?) destruction orgies of all time.
To cut a long story short. [It's all in the book "Moon the Loon" (or "Full Moon" in USA) by Dougal Butler]. The Moon party started with trying to stuff a water bed mattress into one of the hotel elevators, so it would fall out on anyone who'd open the elevator doors (preferably an American tourist). The mattress broke before they even got it out into the hallway, and the water flooded the floor. Moon convinced the hotel personnel that the room had been flooded on arrival, and they were given one of the suites instead. The party proceeded with, mainly Keith Moon, smashing the entire hotel room interior including the windows.
Later the same year the Who was charged 14000$ (=105000 DKr), to cover the damages in hotel rooms on three floors!
Thanks to tape recordings that exist from both concerts, I've been able to write down the set list and kind of a review:
At their concert on the 25th of August, the Who played pretty much the same songs as on the 21st. The "My Generation" jam, however, was different. This included a short segment where Pete played some easy chords and sang "There ain't no way out". This would later turn out as the chorus of "However Much I Booze" on "The Who by Numbers" LP, which came out in 1975, three years later. They also did "Long Live Rock" as an encore.
The Copenhagen concerts even brought about reviews in the rather conservative newspaper "Information". Some readers of this, though, couldn't see the need for reviews of "such rubbish" in a respected newspaper, and complained to the editor. Journalist Lasse Ellegaard, who had just seen the second concert, and reviewed the first one in the first place, wrote eloquently and convincingly about why the Who, or rock music, should be taken seriously.