THE MELON BALL, WATERMELON MUSIC. The Willow Snags (Sacramento, CA) are a rock band rooted in the blues and psychedelia of the 1960s. Featuring the talents of UC Davis alumni Mia Mercado on electric organ/vocals, UC Davis alumni Diego Martinez-Campos on percussion, Joshua Williams on lead guitar, Marisol Werner on rhythm guitar, and Johnny Mercado on vocals. 8p—10p. $15