Osia Bar & Restaurant is actually located at RWS (Resort World Sentosa), is a fine dinning restaurant! Had this on that special day, if you have any special request like birthdays or anniversaries just let them know and some special surprise you might get. Like as for me I got a small chocolate cake from them, besides that I think their services are good, they just ask you like hows everything and etc. So if you are looking for this kind of restaurant you can give it a try! The ambience is nice too!