In the 1920s, “break a leg” was a way to wish theater people good luck in auditions and performances. But in the 2020s, it might as well be “break the internet,” especially since companies have had to cancel or postpone productions or move their performances to live streams in the wake of the coronavirus crisis. Thankfully for thirsty theatergoers, there are a handful of local groups providing performing arts content they can enjoy from the...