The dutchDutch cycling association has institudedinstituted a quality mark for bicycle stands called fietsparkeurFietsparkeur (a contraction of the dutchDutch words for bicycle (fiets), parking (parkeren) and quality mark (keurmerk) getting). Getting the mark means the stand:
- They don'tdoesn't damage your bike directly
- They allowallows bikes to be removed easily
- They areis vandalism proof.
They haveFietsparkeur has a site with a site here which has english information at the bottomsingle page with English information, and a listlist of manufacturers and an overview of producers herevarious bicycle parking stands. The model called "tulip"called "tulip" produced by VelopAVelopA is my favorite. It is used for the streetside bicycle parking facilities near almost all dutchDutch train stations.
The first one linked by Zigdon here is very nice, the best for space efficiency I would say, but not suited for a public space because they can be wrecked relatively easily. If they'll be behind a fence during the night you should be fine.
Finally, to boost the credibility of my suggestions, check herehere for reference material about the type of issues we're dealing with in The Netherlands.