Huh, no one linked to the Herräng Dance Camp in Sweden yet? Then I'll go for it. http://www.herrang.com Four weeks around July, with hundreds of participants each week. Actually, a minority of the participants are swedes: people come from all over the world to this little community, that normally holds about 500 people, to do swing dance. Focus is on lindy hop, tap and boogie woogie. Four hours of lessons each day plus extra introductory classes in other dances than the one you are taking... Wednesday is bluesnight, Thursday cabaret, Friday party with theme - then dance all night if you like.