Longform improvisation has a strong presence in San Francisco , Seattle and Boston .
Longform improvisation is especially performed in Chicago , New York City , Los Angeles ; has a strong presence in Austin , Boston , Minneapolis , Phoenix , San Francisco , Seattle , Detroit , Toronto , Canada , Washington , D.C. ; and is building a growing following in Denver , Kansas City , New Orleans , Rochester , NY ,   ? nxd_id=351262 , and Hawaii .
Improvisational theatre