The Knight Bus main terminal and dispatch station is located in central London near the muggle Victoria Coach Station. The station looks like a typical bus station, with a a ticketing booth and check-in counter, with rows of wooden chairs for those waiting to board a bus. There is a snack stall that sells such favorite as pumpkin juice and chocolate frogs, as well as potions for to help calm nervous or queasy passenger's nerves.
Every bus operated by the Knight Bus is a purple, double-decker bus. Instead of a traditional double-decker interior with two rows of seats, passengers on a Knight Bus stay in beds that are on wheels. These beds move around as the buses quickly travel around, making for a wild ride. There are also chandeliers that hang from the roof of every bus, but no one can really explain why they are there or when they got added.
Hailing the Knight Bus is easy so long as you are somewhere in the United Kingdom, though Ireland and Northern Ireland host their own fleet that does not travel to England, Wales, or Scotland. Though you can owl ahead of time to arrange for a pickup, any witch or wizard in need can simply extend their wand over their head and light it up and the nearest passing Knight Bus should stop just in time for you to climb on board, which is especially handy since they bill themselves as a service primarily for stranded witches and wizards.
The Knight Bus staff are not particularly discerning as to who boards, so long as they can pay. Though a basic ticket starts at eleven sickles, riders can pay more for extras such as hot chocolate and toothbrushes in the evening or meals and newspapers during the day. Daytime travelers are welcomed with cushy chairs while those riding at night will find an entire bed assigned to them for their comfort throughout the ride. Due to the erratic motions the bus uses to move in and out of traffic unnoticed, many infrequent riders are often unaccustomed and need a small dose of Pepper-Up Potion or something similar afterward to set them straight.
In general, though the Knight Bus operates similarly to a taxi service they do primarily serve to transport wizards long distances and are a favored mode of transport between London and Hogsmeade. Minors are not allowed to ride while unaccompanied by an adult unless an adult has given them permission, though occasionally conductors are willing to look the other way for the right price, some conductors are certainly more generous than others.