The pool may be the hottest place in Las Vegas this summer and several hotel casinos have opened lavish new additions. For those into the party scene, The Palms’ has again brought back its popular Ditch Friday pool parties, along with “Skinny Dip Tuesdays” nighttime swimming hours. New pool openings include the Liquid Pool at Aria in CityCenter; Encore Beach Club at Encore; and the new Garden of the Gods at Caesars Palace. The garden’s pool complex is causing a buzz —among its eight pools is the Sokolati, which is filled with real chocolate.