At the Ringside (1921)

"At the Ringside" is filmed in a "slum" which is rather obviously a studio mock-up on the Hal Roach back lot, and it clearly copies the Lambeth-style slum in Chaplin's "Easy Street" (which was also a too-obvious mock-up). The first half of this film is a blatant copy of "Easy Street". Pollard plays the local constable, charged with maintaining order in the tough slum district.