The HazyShade Trio, blending acoustic folk instrumentation and earthy vocals with a casual disregard for genre boundaries, will take the stage at Flat Iron Crossroads in Gloucester on Saturday, April 11. The performance begins at 6:30 p.m. Doors open at 5:30. Tickets are $20 in advance and $25 at the door, available at flatironcrossroads.com. Children under 12 attend free of charge. The setlist will include several songs from an original album titled “Letters from Gilead,” which was inspired by Margaret Atwood’s novel “The Handmaid’s Tale,” as well as the Hulu television series derived from it, said a press release. Featuring Kirsten “Haze” Hazler on acoustic guitar and vocals, John Dacey on upright bass and vocals, and Doug Austin on mandolin, fiddle and acoustic guitar, the HazyShade Trio serves up an unconventional mix of original music and offbeat covers, said the release. Ranging from raucous folk-punk to light-hearted acoustic pop, and from sassy alt-country to sultry swing, infl...