The Skull and Roses Festival took place over the weekend, and Stu Allen and Mars Hotel was one of many psychedelic and jam-rock bands that brought the sound of the ’60s and the spirit of the Grateful Dead back to the Ventura County Fairgrounds. Deadheads rocked and rejoiced with Stu and his talented lineup of friends on Saturday night, under the neon glare of a rainbow of lights. Groovy, man.