An assortment of instruments used to make Celtic Music. <hr> <em>AT A GLANCE</em> <b>WHO:</b> The Celtic Tradition, a three-member group that plays jigs, reels, sing-alongs and other acoustic melodies. The group will also quiz the audience with Irish trivia games and host a best-dressed Leprechaun contest. <b>WHEN:</b> 7:30 to 10 p.m., Friday <b>WHERE:</b> Palace Gallery, 110 S.E. First St. on Highway 99 in Oakland. <b>COST:</b> $8 <b>INFORMATION:</b> 459-6777.