The Beau Brummels broke into the mainstream with their debut single, "Laugh, Laugh", for which they would later be credited with setting one of the aesthetic foundations for the San Francisco sound, along with other bands such as the Charlatans; the song is in the Rock and Roll Hall of Fame list of the "500 Songs That Shaped Rock and Roll".

The group's commercial success declined by the following year, at which time the financially struggling Autumn label was acquired by Warner Bros. Records.

Petersen left to join Harpers Bizarre, reducing the Beau Brummels to a trio for the recording of Triangle.

The duo worked with prominent Nashville session musicians to record Bradley's Barn before parting ways in 1969 to focus on solo material and participate in projects by other artists.

[3] In early 1964, following a string of appearances as a singer on local television, Valentino received an offer to play a regular gig at El Cid, a San Francisco club.

[5] Meanwhile, San Francisco disc jockeys Tom Donahue and Bobby Mitchell were looking for new acts to bring to their fledgling Autumn Records label.

[5] Donahue and Mitchell wanted to capitalize on the Beatlemania craze that originated the previous year in the UK and was spreading across the U.S. by this time.

[5] Rich Romanello, owner of the Morocco Room and the Brummels' first manager, asked Donahue and Mitchell to see the band perform at the club.

[18] The band appeared as "The Beau Brummelstones" on The Flintstones television animated sitcom in the season six episode "Shinrock A Go-Go", which originally aired on December 3, 1965.

[19] When recording began for the band's second album, 1965's The Beau Brummels, Volume 2, Mulligan was no longer a member of the group.

[24] But before an album was completed and released, the entire Autumn roster, including the Beau Brummels, was transferred to Warner Bros.

[25] The non-album single "One Too Many Mornings", a Bob Dylan cover, was the band's sixth and final Hot 100 chart entry, peaking at number 95 in June.

[14] Petersen left the band after the album's release to join Harpers Bizarre,[26] while Irving departed when he received an induction notice into the armed forces.

[28] Released in July 1967, Triangle only reached number 197 on the Billboard 200 albums chart,[17] but it was praised by critics, including Australian journalist and author Lillian Roxon in her 1969 Rock Encyclopedia.

[29][30] In 1968, Meagher was drafted for military service, leaving the Beau Brummels as a duo consisting of Valentino and Elliott.

[36] The band resumed touring, and a 1974 performance recorded in Fair Oaks Village near Sacramento, California was released in 2000 as the Live!

[38] Although the band split up again soon after the album's release, the Beau Brummels continued to work in various incarnations from the late 1970s through the mid-1990s, including shows with The Smithereens, and often appeared in tandem with Dinosaurs, the psychedelic-era "supergroup".

[45] Combining beat music and folk rock,[46] the Beau Brummels were most often compared, especially early in their career, to British bands such as the Beatles and the Zombies.

[13] The Beau Brummels were fans of these acts as well as The Rolling Stones and The Searchers, and originally patterned their overall style after the British Invasion sound.

[48] As the band evolved, they incorporated different music genres into their works, ranging from hard rock to country and western to rhythm and blues.

[49] The Triangle album exhibited the band's growing interest in country music along with elements of psychedelic pop, including the use of strings, brass, woodwinds, harpsichord, and various types of unique percussion.

"[10] The Beau Brummels are considered the first band from a burgeoning San Francisco music scene[40][42] to achieve widespread success in response to the British Invasion, standing out among such bands as The Charlatans, Jefferson Airplane, the Grateful Dead, We Five, Moby Grape, Quicksilver Messenger Service and Country Joe and the Fish.

[3] At the height of the band's popularity, the Beau Brummels were regarded as teen idols, appearing on several television music variety shows including American Bandstand, Shindig!

[5][46] The group's Triangle (1967) and Bradley's Barn (1968) albums are considered early examples in the country rock music genre.