Singapore here. Handshakes are very uncommon, and are generally reserved for business interactions with foreigners. I've found that if I offer my hand to people, they'll take it, but it'll be out of surprise and not a natural reaction. If I wasn't a foreigner they'd probably ask me what I was doing instead of thinking, "Oh, that's right, she's foreign and they do that hand shaking thing." Kind of like how if a Japanese person bowed to a Westerner, the Westerner would probably bow back in politeness, but it wouldn't be a natural thing for them and they might be surprised. Also, generally, men don't shake with or offer to shake with women and vice versa due to some of the major religions around here frowning on it; so, unless you know someone's religion, it can (potentially) be seen as rude to even offer. Handshakes are becoming a bit trendy among the business elite, but they are by no means common or standard.