Books are shelved in general subject categories using the Library of Congress classification system. You may want to supplement your use of the catalog with browsing shelf areas for your topic. Below is a brief listing of some of the subject locations in the fields of theatre and dance.
GV 1580-1799.3 Dance
MT Production of Opera. Music in Theaters
N Visual Arts
NC Drawing. Design. Illustration.
NK Decorative Arts
P Literature (Plays by individual writers are shelved under national and period categories)
PN 1560-1590 Performing Arts.