Plotcright 10-Hour DanceThin Saturday*'The re’s something happening here, what It is ain’t exactly clear ... I think It's time we stop, hey, what’s thatsound, everybody look what’sgotn’ on.”These words are from a song by Buffalo-Sprtngfleld, but they express clearly what will be going on at the Plowright Play, house this Saturday, May 24.The Voice of Daniel will go on stage at 2 p. m. to start what is now ten hours of music at the playhouse. The music festival and Jam was originally slated to begin at 3 p. m., but has been moved ahead one hour due to the number of bands appearing. The dance is scheduled to close at midnight.The Voice of Daniel, from Jamestown, N. Y., will do “Try a Little Tenderness,” “These Eyes,” and popular songs written by themselves, among others. They Join Owl - Soup, Raspberry Tombstone, Lucid Diversions 69-Cent Blues, Purple Haze, The Strange Herb, The Disraeli Gears and The Light Brigadefor the festival.Other groups and solos participating will be announced as soon as further information is received. The invitation is still out for groups and solos interested in playing (contact Lucid Diversions 723-2531X It is also hoped that the musicians will Join a Jam later in the day.The festival is a birthday party for recording artist Bob Dylan who penned such songs as Blowin» in the Wind,”“Like a Rolling Stone,” “Mr. Tambourine Man,” and “The Times They Are a Chan gin’.” He recently released an album featuring Johnny Cash as guest artist.Proceeds from the dance will go to the Plowright Playhouse’s renovation fund.The dance will be chaperoned by members of the Plowright theater.a concession stand has been