3076 ET Rotterdam
You must get onto the A15: the ringway Rotterdam South (Ringweg Rotterdam Zuid). Get off at Zuidplein/Ahoy (19A), go right at the traffic lights and then right again. Now you're on the Spinozaweg.
Baroeg is located at the right of this road. It's a grey building with graffitti on the back and front.
Take a train to NS Lombardijen (station). The road that crosses underneath is the Spinozaweg. It's a 10-minute walk from the station. Do not go in the direction of the square with bus and tram stops, but the other way. There's a small fries-booth on the right side. Just follow the tramway and walk a little further past the big crossroad with a lot of traffic lights. Straight ahead on the left side of the road at the edge of the park is Baroeg.
You can also reach Baroeg via tram and bus, check http://9292.nl/en