The Western District Community Centre started life as a hospital, the old Tsan Yuk Hospital to be precise, built in 1922 and still going strong. You can read more about it on the wiki entry here. It has been given a Grade 3 status which, as you should all know by now, means totally nothing in terms of its ongoing survival.
Real building, fake sign
Coincidentally, the building also contains the Conservancy Association's Centre for Heritage. Streetview below.