It has been another busy summer at the Stephen Talkhouse, the Amagansett bar and intimate live-music venue that has been hosting internationally recognized artists — onstage and in the audience — since 1987. This year, the venue has featured legendary performers including Taj Mahal, Southside Johnny, Buster Poindexter, the English Beat, David Bromberg, Leon Russell, Sonny Landreth, and, last night, Junior Brown.