I spent my weekend at the dormitory.
I was not bad to stay at here with my friends. We drank beer at Saturday night and play basketball at Sunday noon. 听起来自然吗？

It wasn't bad staying here with my friends. (In this case, "-ing" sounds more natural that "to.") We drank beer Saturday night and played basketball on Sunday at noon. (Days of the week always use "on" when you talk about when you did something. For "Saturday night," we don't need to use a preposition at all. For time, we almost always use "at.")