I think if you're visiting for the weekend in summer, Warsaw will be fine. Since it's the capital you have a ton of people around (1.8 million residents) along with thousands of tourists. Unlike what I've heard of Poznań (550k residents) and Wrocław (630k residents), the summer break for universities doesn't have nearly as big an effect on the number of women, although I look forward to September to see what it's like. As I mentioned in
another thread, Polish women gravitate to the capital since there are just more opportunities here. Many attractive women who don't leave for Western Europe, stay in Warsaw, sort of how a lot of young people gravitate to San Francisco, Los Angeles or New York in the U.S. I see at least a couple 9s every day, more 8s and many 6s/7s.
I'm still a relative game newb, but for day game your best bets are the Złote Tarasy (Golden Terraces), the biggest shopping mall in Warsaw, located downtown next to the train station. Also, Nowy Świat (New World), the street that leads towards the Stare Miasto (Old Town). There are many shops/restaurants/cafes here so its probably the most popular street for people to take a casual walk in the city, whether a local or tourist. I think
street game, though the most challenging, is surely the great untapped opportunity in Warsaw. I haven't tried it much so I can't speak to it authoritatively, but the huge volume of talent you see in the busy parts of town should lead to some results. Something like an "elderly opener" that Roosh recommends in
Bang could work so as not to scare off Polish girls who are more shy and reserved at the start. If you haven't already, read
Bang Poland Roosh does a very good job of analyzing the scene in Poland (albeit in Poznań/Wrocław/Kraków) and the type of game to run, basically: "confident, nice guy game". If you speak some Polish it'll help, but many girls speak decent English so there'll still be plenty of opportunities. Get the book though if you haven't, I recommend the Kindle edition.
As far as where to stay. If I could choose any one place it would be Nowy Świat, the street I mentioned earlier. The
Royal Route Residence is an ideal location (I've had family stay here so I've been in the 1 bedroom and studio apartments)). You're right on the corner of the main street and a nice pedestrian-focused street that a lot of people walk through. The location is about 1-15 min walking, 3 minute cab, to many bars and clubs (the clubs are a bit further away, many on Mazowiecka St., while there are some smaller lounges and bars across the street.). I see studio apartments from 31 Euro (~$38) per night. Its more private than a hotel and walking distance to everything you need. If you're just here for a weekend, splurge for something that'll be comfortable and close to the best spots. Since I'm staying longer I can't afford it, but I'm still only a few blocks away in an apartment. Being downtown is huge in Warsaw, and unlike Poznań/Wrocław/Kraków, life isn't centered around the old town. It's not too far from downtown, has a few spots and is nice to visit, but downtown is where the action is at.
PM me if you have any other questions or want to grab a drink. I'm from California, but my parents are Polish and I've gotten somewhat of a feel for Warsaw over the past two years of visits. I'll be here till January.