It’s check-in time for the powerful hotel workers' union at the Marriott Marquis -- the first time organized labor has penetrated the city’s largest hotel since it opened in 1985.

Half of the 40,000 square foot ballroom at the new Marriott Marquis Houston in downtown Dec. 15, 2016, in Houston. ( James Nielsen / Houston Chronicle ) James Nielsen/Staff ...

It was a red-letter day in San Francisco hotel history — the grand opening of the Marriott Marquis, a brash glass-and-steel skyscraper locals called the Jukebox Marriott. Opening day, Oct. 17 ...

The New York Marriott Marquis in Times Square has received a multimillion-dollar revamp, unveiling a refresh of its 1,971 guestrooms and a new F&B partnership with Union Square Hospitality Group ...