Great Western Coffee Shop

What do people talk about 'beyond' the Coffee Shop on rail related transport ... I had a quick look at the number of members on various Facebook groups I'm a member of ... and taking member numbers as representing some form of interest measure ...

Disused Railways - https://www.facebook.com/groups/disusedrailways/ - 13830 members
Disused Stations - https://www.facebook.com/groups/1730959503584733 - 12749 members
The HST Enthusaiats Group - https://www.facebook.com/groups/ukhstgroup/ - 7504 members
Northern Resist - https://www.facebook.com/groups/northern.ruining.peoples.lives -3861 members
Your Crap Railway Photos - https://www.facebook.com/groups/221786714693792/ - 2924 members
Association of British Commuters - https://www.facebook.com/ABCommuters/ - 2985 members
GWR Traction Group = https://www.facebook.com/groups/gwrtractiongroup - 1178 members
GW Modernisation - https://www.facebook.com/groups/1097098530369528/ - 974 members
South West Railways and Heritage - https://www.facebook.com/groups/509389662424579/ - 527 members
Bristol Railway Enthusiasts Group - https://www.facebook.com/groups/230589460445846/ - 338 members
Rail Replacement Buses - https://www.facebook.com/groups/323546794917871/ - 90 members

Now - there may be other groups (and significant ones) I have not come across ... and I have not listed / compared to any (business) pages, nor non-transport pages I'm a member of such as Historic Melksham with 3407 members, the Four in a Bed fan club (4064) or the Lurcher Appreciation Society with 33843!

Edit - added a group to list
Another Edit - added another group to list