KLM has an aeroclub, but I think it is also open to non-KLM employees. One PA28-180, two Cessna 172s and an Aquila A210. Membership costs are between 60-65 euros every three months. The club has been around since the 70s and has operated a range of aircraft over the years, they have been based at EHLE since 1997. Website is here:
https://klmaeroclub.com/ but I don't think there's an English version.