Bishan parkrun is listed as a gym at 1380 Ang Mo Kio Avenue 1, Bishan, Singapore. Its name points to a free, timed community run rather than an indoor gym. It holds a 5.0 rating from 2 Google reviews.
A good community parkrun is judged on the route and on how welcoming the volunteers are. Check that the path is flat and well lit, that there is shade and water nearby, and that the start and finish are easy to find. Walkers and first-timers are usually welcome, so you do not need to be fast to take part. Many regulars arrive early to meet others and to help with the volunteer roles. Look up the event's start time and any registration steps before you go, since these can change from week to week.
Bishan sits around the large Bishan-Ang Mo Kio Park, which has paths, the park connector and the MRT close by, so the run suits people who want a Saturday morning outdoors near home. For anyone in the neighbourhood, Bishan parkrun at Ang Mo Kio Avenue 1 is worth a visit to see whether its route and timing suit you.