Boulder Movement Downtown is listed as a rock climbing gym at 6A Shenton Way, #B1-03 Downtown Gallery, Chinatown, Singapore. It holds a 4.7 rating from 290 Google reviews.
A good climbing gym is judged first on its routes and on how safely beginners are taught. Check that the walls are kept clean, that the holds are secure and that the matting is in good condition under the higher problems. Before you climb, a sensible gym shows you how to tie in or how to fall safely, and how to read a route before you try it. Many regulars start with bouldering, where you climb short routes without ropes, because it teaches movement with little setup. Ask about the belay or induction course and about the rules for children and first-time climbers.
Shenton Way is in the central business district, so the gym is close to the MRT and suits people who want to climb after work. For anyone in the neighbourhood, Boulder Movement Downtown at Downtown Gallery is worth a visit to see whether its routes and induction suit your level.