You might not think of these immediately, or consider them sports (chess), but they include the competitiveness and skill that sports are associated with.
G.S.P.V. Parafrid (Horse riding)
Gronical Dizziness Ultimate Frisbee (crisbee)
G.S.P.V. Parafrid (paardrijden)
Groninger Studenten Alpen Club (mountainclimbing)
G.S.S.V. Moddervet (survival)