Spaldy
Ancient Mariner
I go every year (I'm married to a Svensk) but I've only ever gone to Gröna Lund for the rides. I've not seen a show there as of yet.I was there in August 2010 (had travelled to Sweden to see Maiden at Sonisphere) and managed to see The Cult at Gröna Lund. Great show at a great setting for concerts.

. Sounds like we had relatively close spots (I was almost dead center though), but I think you're overstating it. There were lots of people with their fists in the air, although sure, a mellow crowd and the clear majority were rather still.