Welterweight, the stalwart indie-rock band fronted by singer-songwriter Doug Cowan, has gone acoustic and Americana on us. The “strings ’n’ wood” lineup’s first full-length, A Vida Blue Moon, is so consistently catchy and well-crafted that you won’t even miss the electricity. They play Blue (650 Congress St., Portland) at 7 p.m. No cover (donations accepted; all ages). 774-4111. portcityblue.com.

