British Museum | Museum of Modern Art | Art Deco | Metropolitan Museum of Art | American Museum of Natural History | Art Institute of Chicago | Victoria and Albert Museum | Jack Kerouac | Natural History Museum | San Francisco Museum of Modern Art | National Gallery of Art | Honolulu Museum of Art | museum | Whitney Museum of American Art | Jack Nicholson | Museum of Fine Arts, Boston | Los Angeles County Museum of Art | Solomon R. Guggenheim Museum | Jack Nicklaus | Jack the Ripper | Jack London | National Air and Space Museum | Brooklyn Museum | National Baseball Hall of Fame and Museum | Jack Kemp | Art Nouveau | Royal College of Art | Walker Art Center | Hermitage Museum | National Museum of Racing and Hall of Fame |
He served for five years on the board of the American Society of Magazine Editors, most recently as its vice president; for six years on the board of KLRU, Austin's public television station, which he chaired; for nine years on the Austin Film Society board, twice serving as its president; and for eight years on the board of the Jack S. Blanton Museum of Art at the University of Texas at Austin.
Margolis also worked as a screenwriter and wrote the script for Claudio Guzmán's 1975 film Linda Lovelace for President.
The company also produced the "Cruisin'" series of albums, recreating top 40 disk jockey shows of the 50s and 60s and released on Increase Records (which at the time was a unit of Watermark), and Jack S. Margolis' comedy album, A Child's Garden of Grass, for Elektra Records.