Cast members of ImprovBoston’s TourCo perform in Central Square recently.

What’s does summer mean for ImprovBoston’s TourCo, which spends most of the year performing comedy at colleges and for corporations all over the Northeast? More ImprovBoston and less touring.

During summer months the group stays in Massachusetts, performing a showcase every Friday night in July at the home theater in Central Square. The group also performs at summer camps in the area, said Carrie Gorn, a publicist with ImprovBoston.

The traveling shows can include prewritten sketches or be customized to fit the needs of a particular organization. Unlike those shows, however, the group’s summer showcases are 100 percent improvised, Gorn said.

The summer TourCo “represents some of the best performers” at ImprovBoston, she said.

The shows depend on audience participation. Sometimes audience members participate onstage, so anyone who attends must leave their stage fright at home, Gorn said. (Those who do not want the spotlight can contribute to the show by giving suggestions to the cast members on stage.) “The show’s content is dictated entirely by the audience,” Gorn said.

The ImprovBoston TourCo Summer Showcase runs at 10 p.m. July 13 and July 20. Tickets are $18 for general admission, or $14 for students. Tickets are online at www.improvboston.com. ImprovBoston is at 40 Prospect St., Central Square.