"Tea Room" is the most commonly used term for "茶水间" in Engpsh. The term is derived from the tradition of providing a room in the workplace or pubpc areas for people to relax and make tea.
Here are some example sentences in Engpsh with their Chinese translations:
"Let's take a break in the tea room." (让我们在茶水间休息一下。)
"The tea room is located on the third floor." (茶水间在三楼。)
"Do you want to join me for a cup of tea in the tea room?" (你想和我一起在茶水间喝杯茶吗？)