I know of a few in the town area but they are all pretty expensive.. any in the neigbourhood? North area maybe?
Its abt $85 for 12 lessons lasting 1 hr each depending on whcih type of yoga u're interested in. Also they have peak period or non-peak (cheaper)
Go to the website below for more info! Enjoy
http://www.ssc.gov.sg/SportsWeb/sw_cat_details.jsp?type=11&artID=4410&parent=0&root=0&cat=367