A cheap, popular eatery (shokudō) serving affordable, homestyle meals; a casual restaurant frequented by the public.
会社の近くにある大衆食堂で昼ご飯を食べた。
I had lunch at a cheap eatery near the office.
大衆食堂は安くてボリュームがあるのが特徴だ。
A hallmark of these eateries is that they're inexpensive and filling.
祖父は昔からその大衆食堂の常連客だった。
My grandfather has long been a regular at that cheap diner.