I highly recommend the Warsaw Pub Crawl when you are in Warsaw. They have a great group of people running the event and for 60 PLN, (about $15) you are taken to four different pubs, (two of which are along the beach) and you get free drinks in each of the bars. The group goes to two pubs that you would not be able to find by yourself. This is well-worth doing a couple times while you are in town, (though they go to the same bars each night). This is a very safe way to meet locals and tourists while in town.