There was this small pub in the middle of Prague very close to our hostel and they brewed their own beer there inside the pub, it was delicious. This was around 10 years ago and I have afterwards tried to locate the pub, but on Google Maps everything seems to have changed over there.
Also I remember walking around and some local girl walked over to us and wanted to sell us drugs while a fugging police car was parked like 50 meters behind her, I assumed it was some sort of a trap so we quickly walked away.
Some shady slavic looking guys like from a movie also tried some trick where they wanted to change some coins I guess, I bet they would have taken our wallets if we dug them out, so we retreated from that inside a small shop.
Now that I think about it, I loved the free alcohol laws; you could buy beers in the middle of the night anywhere, even from a wending machine (over here you can't buy alcohol after 9pm anywhere else besides bars/restaurants).