Hi Vianna,
I just ROM-ed at RTC on 14th Feb 09. I got about 50+ guests and was given Dunearn Ballroom 2. Its a big ballroom with high ceilling.
With 50+ pax, the room is still ok, not crowded.
At first, my wife and me likes the Private Lounge too. But as our list are getting bigger, the in-charge gave us a ballroom and we like it even more because we get to decorate it.
Anyway, i am willing to share more experiences. You can email me at alvinpoon [at] pacific.net.sg if you require more infos.
By the way, the day you posted this message, happens to be my birthday too! =)