Re: What do people my age do on weekends/ evening in zurich?
A lot of people your age seem to frequent the bars and clubs in downtown Zurich on the weekends. And during the summer, a lot them hang out along the Limmat river or Lake Zurich and swim, play volleyball, etc.
But most stores and malls do close quite early here (almost nothing is open past 8:00 pm during the week and 6:00 pm on Saturdays). So late-night shopping is pretty much impossible, as is Sunday shopping.