DOORS: 7. MUSIC: 8:30. $10/each night * prizes for best costumes *   It caught on in a flash! Put on your Halloween best all you groovy ghoulies and let’s celebrate the spookiest weekend of the year with FOGDOG & EL GUITARO!   *** ABOUT EL GUITARO ***   New to these here parts…they may just be a popular Adidas sportin’ razzle dazzle party band in disguise playing country covers. You’ll have to see it to believe it!   ***…