Downtown has a bit of a chicken and egg problem where nobody is out at night because nothing is open outside of bars and restaurants, and nothing is open because there is not as much regular traffic.
If you want to hang out at a coffee shop after work (that isnt Tim's), Remedy on Jasper closes at 8:00 whereas on 124th they shut out at 11:00. Looking at Google, a lot of other cafés downtown close at 3:00 or 7:00ish. With city centre mall being fairly empty right now there's not much in the way of evening shopping either.