I wondered if the Garden Hotel was licensed, and if so was it on a dead pubs database. Afraid not.
However, the George, across the road and towards Canterbury has a 1910 photo that has "File & Sons" just about visible on the side of "our" building.
1881 Census has a William File (51) and his two sons Edwin (22) and William (20) as Grocers and Drapers. William snr died 29th March 1882, Probate was for £1452-11s-10d. The two brothers are still grocers and drapers in 1891, with adjacent households.
William is on the 1911 Census, still a grocer and draper, but Edwin disappears, reappearing in the 1939 Register in Folkestone as a retired Grocer. He died on 6th Feb 1947, leaving probate at £17440-18s-11d.
The problem for all such Census returns is that no house numbers were in use, and very few houses named. Some times a pub can be a useful reference to count properties between it and your target, but we do not know if the emunerator actually went along one side then back, or just dodged to and fro so it becomes guess work.