Surfing! Plankenkoorts (PK) is a windsurfing association from both Delft and Leiden. We strive for PK members to wind- and wavesurf for as little as possible. To make this possible, members have access to 3 busses, a gear storage and a windsurfcenter at the Valkenburgse Lake. Furthermore, there are various surfing events and parties as well as a members drink at the Kurk every Thursday.