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dining room; dining hall; cafeteria; canteen; messroom
restaurant; eatery; snack bar; diner
昼はいつも食堂で食べる。
I always eat lunch in the cafeteria.
この食堂は安くて美味しいと評判だ。
This cafeteria is known for being cheap and good.
食堂が混んでいて座れなかった。
The cafeteria was crowded and I couldn't find a seat.