If you want to browse the stacks, you can try these call number areas:
792 Stage presentations
792.01 Philosophy, theory, aesthetics
792.02 Specific aspects of stage presentations
792.09 Historical, geographic, persons treatment
792.1 Tragedy and serious drama
792.2 Comedy and melodrama
792.3 Pantomime
792.5 Opera
792.6 Musical plays
792.7 Variety shows and theatrical dancing
792.8 Ballet and modern dance
792.9 Stage productions