The Leaky Cauldron is a pub and inn for wizards, offering food, drinks and rooms to rent. It was founded by Daisy Dodderidge (1467–1555) in 1500 "to serve as a gateway between the non-wizarding world and Diagon Alley." The current barman and innkeeper is Tom.
There are a number of rooms available; Harry has stayed in Room 11, which has a talking mirror and windows that allow him to look out onto Charing Cross Road. The inn also has a bar, several private parlour rooms and a large dining room for guests to dine. People often stay at The Leaky Cauldron when they come up to London on shopping trips; there is no mention of other wizarding hotels or inns in Diagon Alley.
The rear of The Leaky Cauldron opens onto a "chilly little courtyard" just off of Diagon Alley, but the pub faces onto Charing Cross Road. As such, it is a means of passing from between Diagon Alley and Muggle London.