Did it only once when company sent me for one week but in Outward Bound School in Ubin. Boy, that was fun.
Note that SAFRA is actually for Singaporeans who have served National Service. You can use as "guest" - no problem i'm sure, once you get to know the guys there, they will probably help you sign in as their guest. Quite a close-knit group I think - do see foreigners using the facility when I gym in Yishun.
and they occasionally conduct courses - beginners/ advance. Seems that even a group of gay guys calling themselves "MAW-Men After Work" have their climbing sessions on Sunday afternoons...
need to pester my friends again to take it up with me...