Hello, welcome to Singapore!
I'm learning Pole at Groove Dance School now. They use 45mm poles. Both static / spinning.
Hmm... instructors wise, they're very skilled and approachable. And they've got 2 studios. One at Boat Quay / Raffles Place, and another at Suntec City. Both locations are very conveniently located near MRT stations. (:
If you're interested, their website is :
www.groove.com.sg