There isn't an official club here yet, but Alvin Lee who recently relocated to Perth, Australia, has provided the useful notes below.
Welcome to the Lion City! Its a pity I'm not there as I would certainly love to take you around on the saddle. Though Spore is a pretty small place, there are quite a no of interesting rides. I love the bike path from Fort Rd to Changi Village for an easy and breezy 25km ride or 50 if you do a return. Ubin, a small island off Changi is also very pleasant and rustic. http://lovethefold.blogspot.com/2008/10/off-roading-with-foldies-its-possible.html
But the fun thing about cycling in Spore actually is riding outside of Spore. A ferry ride from Changi to Penggerrang, Johor Malaysia is quite a fun way to spend a weekend.