Surfset Hong Kong – Small gym/box club hidden in an office building away from the tourist area, native English-speaking instructor. Can highly recommend.
Pure Yoga – This is the best Yoga studio I have ever been to. The studio is situated in the business district and is top modern, design, clean and has every amenity one can think of (from little lockers to charge your cell phone, hairdryers, amazingly delicious red date tea!!!, an in-house yoga clothes store, healthy food and snacks). The staff is simply amazing and very welcoming. The teacher I had was great, the class was fantastic. Oh and yes, the view is amazing, too. If you are in Singapore and you love yoga you simply have to give it a try.