That building looks a bit rough around the edges and not very inviting and seems to be WW2 vintage. I see it had a stage and piano so some good times must have been had there. I wonder it is also doubled up as maybe a location for Percivals sports and social club which I have read was quite active.
The world and the airport has changed so much since those days. I would love to step back in time and have a wander around Luton as it must have been a fascinating place.