Marine Parade is a lot bigger, more equipment etc. The one at macpherson is much smaller but gets the job done. I would advise against the trainers though, some are good but I have heard some of them give beginners terrible advice even though they do it nicely...Oh? Why do you say that?
I know this is off topic, but do you know any trainers who train using HIIT routines? Don't seem to see any at Marine Parade