looking for expat contacts (Singapore)

Hi, I am building a new business in Singapore so travelling into town often now. Been here 3 times so far and still not seen the city and all I know are business contacts. I am next in town from the 6th March for a week then will be back every month. Would love to meet interesting fun people to share a beer with, do hiking, play sport etc. Also if anyone can give me any tips please on fun places to go, good places to dance (love house music) or any sports/social clubs where you need more members, especially tennis or hiking or water sports. Thanks for reading this :-) Stu