This sounds familiar to pizzagaters........

"Opium dens had been around in Washington, DC, for some time. Another Washington Post article talks about a September 1894 raid on one at 425 10th Street Northwest, where police were greeted by the sight of nine opium smokers “almost completely under the influence of the subtle drug.” Edward Williams, who gave his occupation as “gambling,” faced charges for keeping the place. The club was officially called the Excelsior Pleasure Club, a legitimate club that was incorporated as a front for the well-dressed patrons who visited regularly. Police had been looking for two “notorious opium fiends” named Matinee Charley and Gypsy Joe, but all they found were several government employees."

EVEN MORE INTERESTING....

The street address from the article still exists. The club no longer exists, but the location is next to ........FBI Headquarters. LOL! https://duckduckgo.com/?q=425+10th+street+northwest+washington+dc&t=osx&ia=maps&iaxm=maps