Passengers in my youth were wee acquainted with red(or green in country/green line areas) and white bus stop colours.
I thought that the green ones were only for 'Green Line' services as 'coach stops' - the red ones were for buses either country or central (I'm aware of some which hung on post deregulation)
This must have given Frank Pick a lot of worry, though...
In a desperate attempt to get back on-topic, perhaps their use of roadside canteen points remote from garages could be considered quirky?
Not all that unusual - must have been quite a few operators had canteens at town centres / bus stations / relief points away from garages (and some where conductors / OPO drivers would pay in at the bus station not the garage / depot at end of shift.)
London Transport had quite a few, some were just for cups of tea and quick snacks at terminus points (Grove Park Bus Station was close to home at one time), some were for meal breaks where routes were operated remotely, e.g. Liverpool Street Station (somewhere in the Broad Street building) used by Dalston / Ash Grove crews on routes 9 and 11 in the daytime, and by many night bus crews at night. Stoke Newington Common also had a remote canteen for Tottenham crews on route 73, what's now Waterloo London General garage had a canteen and was meal relief point for some south London routes when it was just a bus parking area. And think some bus crews used Underground canteens at stations including Morden and Uxbridge (I'm not sure these are still used following bus privatisation.) There are some TFL driver break rooms at bus stations now, but don't think they include proper catering.
Nottingham City Transport had a city centre canteen in the 90s (may even have been above the enquiry office shop premises - I don't know if either is still in use) and Reading Buses had (at least a few years ago) a canteen in the town centre as well as at their depot.
Many bus operators had night services; some even had crews who worked only those services, i.e. permanent nights; the only bus operator I know of who had vehicles dedicated to night services was Salford City Transport
Yes, most London night bus crews were on regular nights (as ever with LT, some garages did different things) - it tended to be senior crews, as it was a regular week - and until a certain point, regular Saturday nights off, as most LT night routes didn't run Saturday night until the early / mid 80s, the whole shift was on 'unsocial hours' rate. And if the crew / driver did the sixth night as 'rest day' (at garages where there was just one night bus) after the 5 day week came in, that would have added up to quite a good pay packet.
Again, there's variety between operators, but most London operators have a separate rota / pay grade for night bus drivers now.
As for vehicles, possibly stretching a point a bit, but London Transport had a batch of 'one and a half deck' Leyland Cub buses built in the mid 30s for the 'Inter Station' route, which at that time ran mainly in the evenings, and one or two buses stayed out all night (photo of preserved example on 'SCT61' website
here.) During the 1939-45 war they were joined by at least one double deck ST bus with some of the lower deck seats replaced by luggage racks (not sure there's a surviving photo of one of these) mainly to cater for members of the armed services in transit. Also possibly the first 'route branded' buses in London? By some point in the 1950s the route became nights only then weekend nights only but used standard RT (then later types) buses off daytime allocations.
More generally, in the days of conductors, it was common at many operators that the driver, on approaching a stop and seeing someone with a white stick waiting, would flash the saloon lights so the conductor would go to the open back entrance to assist.
On London RT / Routemaster buses, the saloon lights were controlled by the conductor, but the light on the platform was part of the side / tail lights circuit, so it was a common signal from driver to conductor to flash this on and off a few times to get the conductor's attention. I don't remember it ever being used for this purpose, though.