Several of the city's most distinctive brass players, a rhythm section led by veteran pianist Ken Chaney, and a hot summer night--for the past couple years, that's been the formula for the Jazz Institute of Chicago's Bebop Brass concerts. The lineup changes from show to show, but the concept doesn't--each evening is a multigenerational jam session neatly structured to highlight the passing of the torch. This year Art Hoyle heads up the three-piece trumpet section; a veteran of Sun Ra's mid-50s Chicago bands, Hoyle has applied his buttery sound and gritty phrasing to styles ranging from bebop to AACM free jazz, and his sly swing lends depth to any lineup. Tito Carrillo, perhaps half Hoyle's age, has emerged as the city's standout Latin-jazz player, with a hot, slicing attack that's also well suited to straight-ahead groups (check his terrific work on Chicago pianist Ryan Cohan's album Here and Now). And David Young, still in his early 20s, unveiled his romantic leanings and heady technique on last year's Appassionata (Big Chicago), a precocious debut that attracted attention from both press and public. Hard-bop master Bill McFarland leads the trombonists, with a buffed, full-throated tone inspired by Curtis Fuller's work in the Jazz Messengers; second chair Audrey Morrison's crisply contained, taut-timbred playing promises to provide a delightful counterpoint. (I haven't heard the highly regarded 20-year-old Norman Palm, who rounds out the section.) Channel Seven newsman Harry Porterfield will act as emcee, helping the audience place the music--and the musicians--in a historical context. In 1997 the first edition of Bebop Brass launched the JIC's "JazzCity" series, which uses concerts, oral histories, and workshops to bring jazz to Chicago's far-flung neighborhoods, including a few that nurtured jazz culture decades ago; this year, the free concert is also part of the city's summerlong "Music Everywhere" series. Friday, June 28, 7 PM, West Pullman Park, 401 W. 123rd; 312-427-1676.