The Salvation Army Barracks in London served both as a place to house members of the Salvation Army and a place to serve the working poor and those in need in London. They provided services such as food, clothing, and a place to sleep and rest. Captain Lobe is stationed there in A City Girl before being deployed to unknown whereabouts. 

“Exposure: Salvation Army Barracks, Photographed by Jack London.” Design Observer, https://designobserver.com/feature/exposure-salvation-army-barracks-by-j....