It seems like these “time paying” cafes are all around Moscow and Saint Petersburg. What it really is that they provide tea and snacks for free, and you pay 2 or 3 rubles per minute. There’s usually a maximum time you can spend there, but maybe not. It depends on the cafes I guess. I haven’t gotten around to visit one yet in Moscow. Mainly because I did a lot of touristy stuff and didn’t have the time. But I think I am going to be focusing on more cafes and shops while in Saint Petersburg this time.
Well, here’s a website in case if you want to visit one when you are here.