I suspect it might be far too fiddley for this
and you could spend all weekend on your computer
but it feels worth mentioning here ...
Staffordshire uses a free database to list folk stuff.
It is sortable and filterable.
https://www.obvibase.com/faq 
There is very little space to add general info so it would still need a FB/wordpress type page for chat.

The Staffordshire example
http://www.thefolkdiary.co.uk