The I-Beam was a former popular nightclub and live music venue active from 1977 to 1994, and located in the Park Masonic Hall building on the second floor at 1748 Haight Street in the Haight-Ashbury neighborhood of San Francisco.

Therefore, Sanford Kellman was required by the city government of San Francisco to soundproof the entire building at great expense, delaying the opening of the club for several months.

Guest DJs included Micheal Dianella and Jim Caldwell frequently creating original remixes.

After Cathy and Randy left, the booking duties for the club were handled by Anita Rivas, and eventually Eddie Jennings.

Live music performers at the I-Beam included Siouxsie and the Banshees, the Pixies, Pearl Jam, U2, Duran Duran, Jesus and Mary Chain, Red Hot Chili Peppers, 10,000 Maniacs, Jane's Addiction, Arthur Lee, and Run-DMC.

Following the 1989 Loma Prieta earthquake, The Fillmore Auditorium experienced a temporary closure and the I-Beam was able to book many bands that would otherwise have played the larger venue.

Because of this the club was featuring live music up to four nights a week, usually Monday, Wednesday, Friday and Saturday, with the occasional Sunday afternoon 'matinée' performance (a legendary Butthole Surfers show, among others).

It was torn down and a modern apartment house with retail shops at street level was constructed on the site.

In 2017, DJ Jim Hopkins and the San Francisco Disco Preservation Society was worked on online archiving club music mixes of the 1980s and 1990s from the I-Beam, as well as Pleasuredome, and The EndUp.