A break room or lounge: a room for resting, eating, or taking a break, typically in an office or facility.
病院の2階には患者用の休憩室がある。
There is a rest room for patients on the second floor of the hospital.
社員は昼休みに休憩室で弁当を食べる。
Employees eat their boxed lunches in the break room during lunch break.
温泉には男女別の休憩室が用意されていることが多い。
Hot springs often provide separate lounges for men and women.