Massive developments now in constructions are bolstering the appeal of the nation's capital for groups, according to Ronnie Burt, vice president of sales and services for Destination DC, the area's destination marketing organization. CityCenterDC, a $700 million complex at the site of the old convention center in Washington, D.C., is on target to open in phases beginning in 2013. The project will include retail, restaurants, residential and office space, as well as a 400-room hotel. The property, not yet flagged, is expected to be a boutique brand, said Burt. Meanwhile, the $500 million Washington Marriott Marquis is poised to open in the second quarter of 2014. The mammoth property, with 1,175 guest rooms and 100,000 square feet of meeting space, will be connected to the Walter E. Washington Convention Center via underground pedestrian walkway. "All this new development is in addition to hundreds of millions of dollars in existing property renovations now taking place throughout the district," Burt added.