String quartet

A string quartet was a musical ensemble composed of four string instruments, typically two violins, one viola, and one cello. The term "string quartet" could also refer to a piece written for such a group. The ensemble was commonly used in the genre of classical music from Earth.

In 2366 a string quartet featuring Lieutenant Commander Data on violin and Miles O'Brien on cello performed in the USS Enterprise (NCC-1701-D)'s Ten Forward. 

Later that year, Data and three other officers performed in a string quartet for visiting Ambassador Sarek. 

In 2375, a string quartet performed at the Evora diplomatic banquet held on board the USS Enterprise (NCC-1701-E). 

Featured String Quartet repertoire
Star Trek: The Next Generation '' It is the Bach Concerto for Two Violins in D Minor, 1st mvmt (affectionately known as "The Bach Double")
 * Wolfgang Amadeus Mozart
 * String Quartet No. 19 in C Major, K. 465
 * Serenade for String Quartet and Bass in G Major, K. 525, "Eine Kleine Nachtmusik": I. Allegro
 * Wolfgang Amadeus Mozart
 * String Quartet No. 17 in B Flat, K. 458, "The Hunt": I. Allegro vivace assai (Note: This is contrary to the credits listing of "IV. Allegro vivo-assai.")
 * Joseph Haydn
 * String Quartet in D Major, Op. 64, No. 5 "The Lark": IV. Finale (Vivace)
 * Composer Unknown
 * String Quartet played as Jean-Luc Picard exits the anteroom adorned with beads during the banquet.