noun
self-service drink bar; all-you-can-drink station
Common in family restaurants, buffet-style eateries, and some cafes in Japan. Typically includes soft drinks, coffee, and tea for a flat fee or as part of a meal set.
wasei-eigo (Japanese-coined English), from drink bar
ランチセットにはドリンクバーが付いています。
The lunch set comes with access to the drink bar.
ドリンクバーでコーヒーを何杯もおかわりした。
I had several refills of coffee at the drink bar.