The sound of clinking glasses pierced over the din at Lucky Danger in D.C.’s Chinatown. Past the tables filled with diners and happy hour patrons on a Wednesday night, toward the back and beyond another bar in the restaurant’s inner sanctum, the washing is taking place.

The “dishwasher,” however, is an automatic mahjong table; and the “dishes” in this case, are mahjong tiles. “Washing” is the term used to shuffle them.

Overseeing the Wednesday night learn-to-play mahjong classes is Tim Ma, resplendent in red, a kindly presence giving hints to new players who picked up the game quickly, and telling those who needed a few more tries what tiles to discard and which ones to keep.

Mahjong is a game that originated in China. It’s usually played with four players, who pick up and discard tiles

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