Batten down the hatches this Halloween and jump aboard the spookiest boat party around. Taking place on the mysterious Dutch Master Vessel, you can expect three floors of spooky mayhem and Captain Jack Sparrow to host your voyage in proper pirate fashion. Get your groove on to Xclusivetouch's pulsating blend of hip hop and house, and finish the night with complimentary entry to an exclusive afterparty at Opal Bar. Fancy dress is a must, but you assumed that already, didn’t you? It’s Halloween, yo: go wild or go home. Over 18s only. Valid ID required. Dress code: fancy dress is required, whether it’s an eye patch, a toy parrot or a full on costume. Boat departs: 7:30pm. Please arrive at the Tower Millennium Pier on time or the boat will leave without you. Sorry, but no refunds for latecomers. Opal Bar address: Hungerford House, Victoria Embankment, London WC2N 6PA.