Bloomfield played on recording sessions between 1965 and 1967. His guitar playing had a huge impact on San Francisco Bay Area musicians after playing with the Butterfield band at Bill Graham's Fillmore in March 1966, San Francisco's Avalon Ballroom and also in the Los Angeles area due to the storied two-week run at the Golden Bear in Long Beach. He became a mentor and inspiration for many guitarists, especially in the SF Bay Area. He did a 1965 date with Peter, Paul and Mary that resulted in a song called "The King of Names," and he recorded in 1966 with pop group Chicago Loop, whose "When She Wants Good Lovin' (My Baby Comes to Me)" made "Billboard Magazine"'s chart that year. He also played guitar on recordings by Chuck Berry, Mitch Ryder and James Cotton.