Butter Beer is a favourite drink served at pubs frequented by Witches and Wizards. For example the Three Broomsticks in Hogsmeade and the Leaky Cauldron in Diagon Alley both serve Butter Beer. It can be served hot and foamy or chilled. Madam Rosmerta, the proprietor of The Three Broomsticks Inn is known to serve up excellent Butter Beer.
The Leaky Cauldron is a popular wizarding pub and inn in London. It is the entrance to Diagon Alley, and, indirectly Knockturn Alley and serves as a gateway to the non-wizarding world. It was built by Daisy Dodderidge, the first landlady, in 1500.