The Witherspoons Golf Society mostly play on Monday, Wednesday and Friday at many of the Golf Clubs around Pattaya.
For details of venues they have a Board outside the bar and also a calendar on their website which also has Departure times (Normally between 9:00 and 10:00) and Tee times.
Prices vary depending on the course but are around about 2,000 baht.
They do also have some options to hire clubs and equipment.