Please let me know if you would like to play outdoor basketball on weeknights, and if so, which weeknight and which location you suggest and/or prefer. There are courts on the Museumplein (but probably quite busy), Ceintuurbaan (busy and very competitive), next to the Erasmuspark (kids may be playing there), close to the Van Hogendorphal and in many other places. I don't know which one would be best in the sense that it's a nice court, likely to be available and conveniently located.
Three things to keep in mind about outdoor games:
1) It is not possible to reserve outdoor courts. This means that the court may be being used by other people when we want to play, and so there is no guarantee that we can actually play there when we want to play, and we won't know before we actually get to the court. It may be possible to join players who are already there though (and players may want to join us).
2) It may rain. A bit of rain isn't so bad but more than a bit becomes problematic, also because fewer people will show up then and we may not have enough players for a good game. So if it is expected to rain when we play the game will be cancelled.
3) The upside of it being impossible to book the courts in advance is that they're free to use, so outdoor games are always free.