Swimming @ Anchorvale Community Club

Entrance fee: $1.00 for adults; $0.80 for children
Where: 59 Anchorvale Road, Singapore 544965
Tel: 6489 4959
Bring: Parking coupons. $0.50 per half hour (that's what it cost us when we went).
What's in our bag: Sunscreen. Towels. Fresh clothes. Soap. Shampoo. Cash for lunch.

How to get there:
Well, we drove there, so you're probably better off getting the enlarged map with detailed driving instructions off Google Maps to get there.
If you're not driving, take the MRT to Compass Point station. Then switch over to the LRT (Light Rail) and alight at Farmway LRT station. It is within walking distance from Farmway LRT station.
Haven't tried taking the bus, but the staff there advise getting there by LRT, because the nearest bus stop is some 2 bus stops distance away. So, expect a fair bit of walking.