[2] Though not required or necessarily encouraged by improv professionals, elements of humor inevitably surface in the performance because of the surprising and playful nature of improvisation and its use of typical Broadway stereotypes.
The performers' songs are supported by an onstage musician or band that improvises the music, generally in the style of typical show tunes.
Currently, it is performed by BATS theatre in San Francisco, The Mop & Bucket Co. in Schenectady NY, and at several colleges around the country, including Stanford.
In 1995, TheaterWeek Magazine named Kat one of the year's "Unsung Heroes" for her creation of Spontaneous Broadway, which is now performed regularly by teams of actors all over the world.
Produced by musical director John Thorn (who secured the Australian licence from Kat Koppett) and hosted by Russell Fletcher, many of Australia's finest comic improvisors have since performed the show around the country, including sell-out performances at the Sydney Opera House, The Famous Spiegeltent, and at the Melbourne International Comedy Festival, receiving rave reviews and legions of repeat attendee fans.