If SIXGA's office is used for other activities, I could help to book Bishan Classroom 2 (with valid reason ??, otherwise the rental is quite high), our club house.
Free periods need to be checked unless to plan with a few Wednesday evenings together with our activity nights and could be free of charge for this arrangement.
Currently, our club opens on every Wednesday 6:30pm to 10 pm, big enough for 40 players or more. Our 2007 internal competition with 20 players took about half of the space.
Bishan should have more than enough 棋具 and 棋钟 (without adding seconds type).