If you’re at all interested in the Beats and especially Jack Kerouac, you’ll definitely want to take a look at J Haeske’s blog: Retracing Jack Kerouac, wherein J follows Kerouac’s On the Road through photographs. Check it out!
Jack Kerouac and Neal Cassady are talking about the ‘J.J. Green Company’ at 1923 Market Street, Denver in one of the long conversations that Kerouac recorded on tape and that are featured in ‘Visions Of Cody’ (p.209 Flamingo Modern Classic edition). The building set back from the street on the left of the first photograph now does stand at this address, but is probably not the same building standing in that address back then.