This photo of Bumbles wine bar was taken in November 1982. The sign in the window reads "Bumbles Open Thursday 18th Nov at 7pm" so presumably the photo was taken to advertise the opening of the wine bar on that date. Bumbles wine bar was located on Rainham High Street almost opposite Pudding Road. The wine bar was owned by James Field. The building is now PHC Homecare appliance repair shop.
Apparently the building was Fred's Cafe in the 1960s with many people having fond memories of visiting for strong cups of tea. By 1990 the building had become an Indian restaurant so Bumbles Wine bar was open less than 8 years. Fred's Cafe in Rainham is listed in the 1951 High Street traders at 126 High Street.
I can't really recall this wine bar existing in Rainham when I was a teenager so assume it wasn't open for very long.
The photo below shows the PHC service centre in 2001. You can see the step is the same as the Bumbles wine bar photo above.