New York City’s nearly 2,000-person contingent at the International Council of Shopping Center’s annual RECon conference in Las Vegas jumped from a day of pool lounging and dealmaking to party hopping last night. Attendees had more than two dozen parties to choose from. The Midtown-based brokerage RKF hosted several hundred people at the Cabo Wabo overlooking the Las Vegas Strip, while the SCG Retail threw a cocktail party for thousands at the Grand Ballroom in the Four Seasons. The parties on Sunday capped the first day of the three-day conference that runs through Tuesday. Despite the show opening the floor at the Las Vegas Convention Center, many of the city’s deal mavens were lounging poolside at the Wynn. Insiders such as investors Jeff Sutton and Alex Adjmi, as well a brokers like Robert Knakal of Massey Knakal Realty Services, David Greene of Cushman & Wakefield and Jason Pruger of Newmark Grubb Knight Frank were spotted at the Wynn pool, soaking in the sun.