The Algonquin Commons Theatre is a state of the art venue that opened in the fall of 2012 on The Algonquin College Woodroffe campus. Located in the Student Commons (E Building), the primary purpose of the space is to host student events, theatre, live music, guest speakers, dance and more, and the space is also available for outside rentals.
Located in the Jock Turcot University Centre on the University of Ottawa campus.
Ottawa's Centre for the Performing, Visual, Literary & Media Arts!
"The Bronson Centre is a community facility in Ottawa, Ontario, Canada which provides office and meeting facilities for non-profit organisations. It is located at 211 Bronson Avenue, on the western edge of the city's downtown core." (From the Bronson Centre Website
In 1988, with Famous Players no longer wanting to run single-screen cinemas, they moved out and the Berlin family sold the building. It became the ByTowne, continuing an independent programming policy that had been started at the Towne Cinema (on Beechwood Ave.) back in 1973.
Centrepointe Theatre opened in 1988, and since then has seen performances but a variety of talented artists including Sarah McLachlan, Kids in the Hall, the Rankins, Lyle Lovett, the Moscow Philharmonic Orchestra, Harlem Gospel Choir and many others.
The Gladstone Theatre is a 230+  seat theatre in Ottawa's Little Italy.  The Gladstone hosts a number of professional theatre productions, concerts, comedy nights, dance shows and amateur performances each year. The Gladstone is also available for corporate events.  The foyer has a lovely old theatre feel with white marble, old chandeliers and a full bar.
The Great Canadian Theatre Company (GCTC) is a 260 seat theatre incorporated as a non-profit organization with charitable status.GCTC celebrated its 35th Anniversary Season in 2009 – 2010 and in that time,  developed from five people from Carleton University with little more than an idea, to become a vibrant independent professional theatre company.
The Mayfair is truly an independent theatre in every sense.  Never it it's history has it been affiliated with any major cinema chain. The Mayfair was built as a theatre and cinema in 1932 and remains a great spot to catch a film, see a show or hear an author read.  The Mayfair is a venue for many of the major film festivals around Ottawa.  
The National Arts Centre collaborates with artists and arts organizations across Canada to help create a national stage for the performing arts, and acts as a catalyst for performance, creation and learning across the country.