Demographic Composition: Croats 91.94% Serbs 2.41% Bosniaks 0.80%
Average Female Height: 166.4 cm(5 ft 5 1⁄2 in)
Zagreb is a city barely big enough to have a constant volume of girls walking around, your best bet is to hit Ilica street: a semi-pedestrian street that has a Tram line and a good number of shops that draw girls on both sides of the road, It begins in Zagreb's focal point: Ban Jelačić Square, a popular meeting point that often draws lots of people since it has an important tram station.
The busiest segment of Ilica can be walked in 5 minutes, if you don't want to be on this street on an infinite loop you can go to frankopanska ulica for university students or towards King Tomislav Square to meet girls going from/to Zagreb's main train station. You can also go to Petar Preradovic square, a small pedestrian area worth going to.
Rain can be a big obstacle as there is no large Malls in this area to retreat at. Arena Centar, a 200+ store shopping center, is the best option but keep in mind that its not close to the city centre. Another weakness of this city is that it gets particularly empty when it gets dark and on sundays.
For night date's venues keep an eye on Radićeva ulica, a pedestrian street packed with restaurants and bars.
Best times to visit
Zagreb enjoys nice weather from april to october, however, during the peak of the summer (july and august) the city becomes too hot for people to walk around in significant volume during most of the day.
Also, small cities like Zagreb suffer from a lack of serious young female volume during the university summer break (june to september) which leaves us with April, May and October as the best months.
According to the Croatian Bureau of Statistics (www.dzs.hr) more than 90% of people living in Zagreb speak English and/or another European foreign language (mostly Italian or German). It's rare to find a young girl in Zagreb that does not speak english.
See wikipedia article.
Croatia is a member of the European Union but it does not make part of the Schengen area. this means the following:
If you are a EU citizen, you can stay as long as you want (blue and yellow in the graph)
If you are in the green countries, you can stay in Croatia for 90 out of every 180 days even if you run out of your Schengen Area days.
Gray countries need to apply for a visa
Numbeo Apartment (1 bedroom) in City Centre Average Monthly Rent: 492.88 USD
Croatia's Average Airbnb price per night: 43£ (60.39 USD) according to Vouchercloud
Numbeo cost of living data:
Arriving to Zagreb
Check out the 'Get In' section in Wikitravel to know how to get from the airport to the city centre.
I believe the best method of street game is the London Daygame Model. I recommend the key textbook Daygame Mastery. It's an encyclopedia of street game technique. For video, I suggest the infield instructional Daygame Overkill.