Playing at our usual weekly Jam last night. Big honking thunderstorm blows through. Power goes out. We are a totally acoustic group (I play the Lidl.) Pretty much everyone has the music on some sort of tablet (no, it's not all in our heads.) So, tablets have batteries, everybody can see the music, and there's no amplification in use - jam merrily rolls along until it's going home (in the dark) time. Had to turn around once for a downed tree.