Running is very popular here, as well as bicycling. Surfing and kayaking, of course.
And I'm sure tennis 🎾 will move to the top of the list for a while at least!
Not sure if fishing and scuba diving count as sports, but they are popular past times.
Sadly I have no idea how to find clubs or groups of people on the island with shared interest - websites don't seem to be very popular here so Google searches don't serve the purpose.