“People come up to me all the time and say, ‘Wow man, 50 years! We can't believe it,’” laughs Castillo. “You can't believe it? I'm the one that can't believe it. We've been through a lot of ups and downs and learned a lot along the way. We've affected a lot of people's lives and done a lot of work that we're very proud of. The band has a real family atmosphere. It's been very rewarding.” The band has long since surpassed Castillo’s admittedly modest aspirations, traveling the world, enjoying hit singles on their own and backing some of the most legendary artists of the last 50 years. In the process they’ve defined an “Oakland soul” sound as instantly recognizable as those from Castillo’s hometown, Detroit, as well as inspirations like Memphis and Philadelphia. “Oakland is a very special city,” Castillo says. “It has a really unique type of soul to it. I loved Memphis soul music, yet because of my upbringing I always wanted to make it slicker. I think that defined my approach to music.” “You can take the boy out of Oakland, but you can't take the Oakland out of the boy,” insists Castillo. “We always called the East Bay, where we were from, the dark side of the Bay. It was more ethnic, with a lot of blacks, Hispanics and Asians, and soul was the thing there. So, we called our first album East Bay Grease and put a map of Oakland on the cover, which proved to be a really smart move. People all over the world started saying that we represent the Oakland soul sound.”