For the most part the homeless live inside abandoned buildings or under the bridges since the weather in Warsaw is drastically different than in the SF. If you are a drunkard, you are very likely to die in the winter due to exposure.

Example 1: https://www.youtube.com/watch?v=X1TyHe7b0SY

Example 2: https://www.youtube.com/watch?v=BWUmdTvtSJo

An example of people living under the bridges:

https://www.youtube.com/watch?v=6Homx6vJ3R0

Some charities distribute sleeping bags and mattresses at the end of the summer so that people don't freeze - no shelters allow drunk people.

If you sleep in parks or elsewhere, the police are going to remove you from there to a drunk tank.