饭馆。in oral word we always say :"馆子。”

我喜欢去留学生餐厅，下饭馆吃饭，当然饭店说得是最多的。

restaurant 餐厅，饭馆 hotel 饭店，宾馆 restauant is the place only to have dinner,and hotel not only for dinner,but also for live.

饭馆

The most common word I thik is 餐厅。 饭店，饭馆 and 餐厅 they all mean restaurant. But 饭馆 and 饭店 sound not so fashionable，the young people in Beijing we usually say 餐厅。 but sometimes, when you see “x x 大饭店", that should be hotel.