Relating the histories of two important London fringe theaters--the Round House and the Open Space--with the use of rare archives, this text offers a detailed look at these pioneering companies and answers key questions about performance space and its influence on the types of productions successfully presented. The work of maverick American playwright and director Charles Marowitz, who founded the Open Space Theater, is fully detailed, as is that of political playwright Arnold Wesker, who founded the Round House. Also explored is the role Thelma Holt played in the development of both theaters. Rare photographs of productions and a complete list of plays and events staged at the two venues are included.