Chautauqua Auditorium is heated and cooled by nature, and you won't get rained on. The venue, which was opened in 1898 and can seat 1,300 people, has long been an ideal spot for summer concerts, and over the past few years, the folks at Z2 Entertainment, which operates the Boulder and Fox theaters, have done a noble job booking talent for its summer concert series. Last year's shows included a variety of national acts, like Blind Pilot, St. Paul & the Broken Bones, Lucinda Williams, Drive-By Truckers and Punch Brothers.