Sacramento jazz fans, get ready. The second annual In the Flow jazz festival starts Friday and will be invading four venues on downtown's Broadway. Last year's festival was held on the patio of True Love Coffeehouse. This weekend, Beatnik Studios, The Comedy Spot, R5 Records and Java Lounge are opening their doors for three days of live jazz performances. "Sacramento has an incredible jazz scene. We have great players with great, original ideas that span all things jazz and beyond," said Ross Hammond, the main coordinator of the festival. The idea for the festival was dreamt up during a coffee outing with Hammond, jazz musician Byron Blackburn and some of their friends. They wanted to h