Arena Stage

The African Continuum
Theatre Company (ACTCo)

British Embassy Players

Catholic Univ. Drama Dep

Chevy Chase Players

Capitol Steps, The

CurtainUp 

DAR Constitution Hall

DC Improv, Comedy Restaurant

Ford's Theatre

Fraudulent Productions

Feet of Clay

The Foundry Players

The Theatre Lab

Hexagon

John F. Kennedy Center
 for the Performing Arts 

NOW THIS, 
a musical improv troupe

The National Theatre

Omaemoda

Rorschach Theatre

Saint Mark's Players

Source Theatre Company

The Catalyst Theater
Company

The Studio Theatre

The Shakespeare Theatre 

The Showboaters

Washington Savoyards

Warner Theatre

Warner Theatre's own web site

Washington Area Theatre Community Honors (WATCH)