Dear Gracelynn/Zenn/Sean,
Thought I will help out here. I used to work there few years ago when they were in the midst of movong from the old place at Jalan Buroh to West Coast.
RSYC is the oldest member's marina club in Singapore. Other marina club include Raffles Marina and the revamped Punggol Marina. The club is less than 5 years old, and although they are a members' club, they are having problems sustaining their f&b facilities through their own members only.
You can call and ask but I do not think they restrict non-members to hold weddings there. It is quite economical too, value for money, nice marina ambience, a exclusive event venue.
However, I would have these concerns if I am having a wedding there.
1) Is food catered from outside?
2) What is the service like? Are most regular part-timers?
For Sean, no, the restaurants are not opened for public. But if you turn up, are seated and taken your orders, they would not chase you out becos you are not a member.
Hope the info is useful.
Cheers.