Matashi,
I did my solemnisation at Sentosa Resort and Spa. Small and cozy one with 30 pax only. Rented a villa, drank, played games and went crazy in there. Enjoyed it much much better than my actual wedding! That being said, we kinda smuggled food in there by a talented young chef who whipped up a custom meal for us. I heard from a friend that the hotel's food is so-so only.