The Prancing Pony is an inn located in Breethat appears in The Desolation of Smaug and The Lord of the Rings.
In 2940, Thorin Oakenshield met Gandalf by no chance meeting. There, they discussed the quest to reclaim Erebor.
In TA 3019, Frodo Baggins, Merry Brandybuck, Sam Gamgee and Peregrin Took stayed at the Prancing Pony after a long journey from Bag End to Bree. Aragorn was also staying there, and it is where he and the Hobbits have met.