Pinetree Club or The Pines is another option which is also near Raffles club. Which also has some expats but it is a predominantly local club. Should be able to find lots of local friends there.
The Raffles and Pinetree clubs fees are closer to S$10,00 mark.
For S$50,000, try Keppal country club, Laguna clulb which has golf courses as well.
for an idea on both golf and non-golf clubs.
Most clubs here are local clubs excpet American, British and Hollandse clulb which have a hiigher %tage of expats ( about 50-60% at least ).
You have to visit the club to have a feel of the place. Generally, locals are friendlly towards expats untill more recentlyl there is growing resentment ( due to expats own bad behaviour ) towards expats but are not too widespread as yet.