Three! "All About Cambuslang" the original, "Fàilte gu Camas Lang" a newcomer but has really helped bring people together in lockdown, and "Whats happening in Cambuslang" which is mostly business posts.
I think every estate and scheme has its own mini one too, eg Drumsagard, Newton Farm, the new houses down at the Hoover site, but they dont let outsiders join ;)