Find the best Maggie's Christmas Extravaganza variety show tickets at Swansea Arena, Swansea. Charity support show. Maggie's offers the best possible free support to anyone with cancer. Maggie's is there for anyone with cancer and their family and friends, whatever kind of cancer, and whatever stage they're at. There's no time limit on the support they offer, they'll be there for as long as they're needed.