Pandemic willing, live shows will be back across the United States this spring and summer. (A patchwork of them, anyway.) Scores of festivals, benefits and theatrical events are playing it safe with digital editions or postponements, but some impresarios are forging ahead, adhering to safety protocols, capping audience size and keeping it outside, mindful of all the artists and fans left bruised last year by cancellations. Jacob’s Pillow, a premier dance festival in Becket, Mass., will be scaled down to 15 or 20 companies from the 50 companies that had to be canceled last summer. In 88 years, it was the first time the show did not go on. “We…