A Holiday Blues-A-Palooza will be held from 6:30-9:30 p.m. Saturday at Flat Iron Crossroads in Gloucester. The collaborative performance will feature Jenny Langer & Moonshine Society, joined by blues-reggae guru Kelly Bell Band, celebrity saxophonist Ron Holloway, and DC’s Queen of Blues, Carley Harvey. Doors open at 5:30 p.m. with food from The Pull Up food truck, serving seafood and American classics. The venue is holding a raffle worth $2,200 in total value for $20 per entry. VIP tickets are $55 and include table seating and merchandise from the artists. General admission tickets are $30. For more information, visit flatironcrossroads.com....