The term 'boat party' has now become clubbers' shorthand for 'debauched rave', but the folk behind this event are shoehorning some class back into things. This party on the SS: Atlantica will be saluting the forgotten age of ocean travel, with the vessel transformed into a 1931-era cruise liner, featuring live jazz and swing bands, blackjack and roulette tables and cabaret. The dress code is 'At-sea formalwear', so expect everyone to look like they're in an episode of 'Poirot', but things won't get too formal, at a 'Champagne-sodden foray into the glamour of yesteryear's most luxurious form of travel.' All aboard!