All tracks composed, arranged and performed by Portico Quartet (except 'Steepless' written by Cornelia Dahlgren and Portico Quartet).
The first release on the club's own record label is by the Portico Quartet.
Kronos Quartet | Modern Jazz Quartet | Arditti Quartet | Alban Berg Quartet | Pacifica Quartet | Juilliard String Quartet | Fine Arts Quartet | Emerson String Quartet | quartet | Amadeus Quartet | Vermeer Quartet | Pro Arte Quartet | Modern Folk Quartet | FLUX Quartet | Belcea Quartet | Ying Quartet | Turtle Island Quartet | Quartet on the Middle East | Petersen Quartet | Ethel (string quartet) | Ciompi Quartet | Smith Quartet | Sacconi Quartet | Quartet | London String Quartet | Homer's Barbershop Quartet | Hollywood String Quartet | Australian String Quartet | Zoellner Quartet | Time Quartet |
While studying Ethnomusicology at the School of Oriental and African Studies, Mulvey met the other members of Portico Quartet.
Offline has put on well known acts such as Mercury Prize nominees The Portico Quartet, author Howard Marks, comedians Rob Newman, Stewart Lee, Josie Long, Robin Ince, Richard Herring and new wave legend Tom Robinson, with all acts being paid two pints of beer.