With shows 7 days a week—and four on Saturday—Improv Asylum is always hopping. A resident cast presents sketch material and improvisation, taking audience suggestions and ad-libbing vignettes on the spot. Given its appealing location close to Faneuil Hall Marketplace and on the main drag of the tourist-heavy North End, most shows sell out, so get tickets in advance. The company celebrated 20 years in 2018.