Barnaby was the owner or manager of a demon bar in Britain.
Rupert Giles entered Barnaby's bar to intimidate Barnaby into giving him an item from his back room. Giles required the item to cast a dark magical spell to reveal that his fellow watcher, Willem Bryardale was also using dark magics in an attempt to secure the upcoming position as Buffy Summers's watcher.
Barnaby had several tentacles coming out from under his coat. The demonic patrons at his bar didn't seem to care that Giles was roughing up the man who ran the place. Barnaby said that Giles had grown more balanced since his training at the Watchers Council. He said that Ripper would have pummeled him first and asked questions later.