sorry idk
but other places I'd look at too,,,

Orkney Music & Culture might have info.
https://www.orkneymusicandculture.org/ *

https://m.facebook.com/Orkney-Music-and-Culture-106754968075688/posts

*They used to list
First Friday every month, Open Session in The Sands Hotel, Burray, in the conservatory from 9.00pm.
&
Second Friday every month Song night at the Neuk Bar, Albert Hotel, Kirkwall.

&
TheSession pages
https://thesession.org/sessions/nearby?latlon=59,-3