I have organised an editathon, in conjunction with the West Midlands Police, at the West Midlands Police Museum in Birmingham, on 15 March.
https://en.wikipedia.org/wiki/Wikipedia:GLAM/WM_Police_Museum
It's a small venue, not usually open to the public, with a very interesting collection of objects and archives. There will be good opportunities for photographers.
Places are limited, due to the museum's small size.
I hope to see you there.