I took this picture of a beer in a great bar in Holisovice (Prague 7) in front of the Stromovka Park.
If you want a place without tourists, go there. I only met Czech people from the district! And it's open everyday from 4p.m. to 4a.m. The name of the bar is Stromoffka bar.
And last but not least: you can enjoy a good Pilsner Urquell for only 42 czk!