From Central Station: Take tram 9, stop at '1e van Swindenstraat' from there it's about a 10 minute walk: left from the stop, through the Van Swindenstraat, underneath the tracks, then onwards ... to victory!
More prosaically, from when you cross underneath the tracks, you keep going on, through the Javastraat, when you cross the Sumatrastraat, you can go left (into the Sumatrastraat) to walk straight into the Timorplein and the Stay Okay, and/or right (also into the Sumatrastraat) and right into the Balistraat, there the venue is at no 48A (big community center, called De Meevaart)
The Schutter (i.e Spuiplein) can be reached with the same tram 9, stop 'Spui', and this line also hits Rembrantplein. Tram 7 and 3 hit Leidseplein and Vondelpark, respectively, and both have stops near Muiderpoortstation, which is 5 min walk from the venue: coming from the Sumatrastraat (i.e. from the Stay Okay), you keep walking until the end of the Balistraat, then to the left until you hit a big thoroughfare (Insulindeweg); the trams stop right there.
I'm not going to list all the tram-time-tables, but as a general example, the last tram 9 will pass Spui (stop from the schutter) around 00:30. After that's there's a nachtbus (nightbus) network, line 357 follows nearly the same path as tram 9, with the same stops (don't forget to press the 'stop' button on the right spot, or the bus will keep going!). It will go once ever 30 minutes, starting just after the last tram.
Walk will be about 45 minutes, adusted for alcohol/weed consumption!
I wouldn't get a 72 hour ticket, unless you keep passing back and forth.