HSMAI Washington DC Chapter, which serves hospitality professionals throughout the Washington, D.C., metropolitan area, will host a holiday celebration for area hotel sales, marketing, and revenue management professionals Dec. 15. from 4 to 6 p.m. at the Bethesda North Marriott Hotel & Conference Center in Rockville, Maryland. Hospitality professionals are invited to attend by registering at https://www.hsmaidc.org/events/holiday-event.