The Daily Arts guide to the best upcoming events - it's everywhere you should be this weekend and why. AT THE ARK What does folk music have to do with "Robo- cop" and "Deliverance?" Well, not very much, except both films feature folk musician Ronny Cox in an acting role. His con- cert Sunday at the Ark looks to be less violent than the aforementioned films. Doors open at 7 p.m. Tickets are $15. ON STAGE Contemporary popular musicians often breed obsession, and Ludwig van Beethoven must've been among the first songsmiths to attract a following. As music school students will show in solo recitals at Beethoven: The Sonata Obsession Concert No. 12, that fanatical inter- est still survives. Free at the Walgreen Drama Cen- ter Sunday at 5 p.m. AT THE PIG Robert Pollard, who became a'90s indie- rock hero with Guided By Voices, comes to the Blind Pig Friday night with his new band Bos- ton Spaceships. Despite having been a road war- rior for two decades, Pollard will make his first ever Ann Arbor appear- ance with the concert. Doors open at 8 p.m. and tickets are $15.18+ only. AT THE PODIUM Catholicism and homo- sexuality have never quite been a match made in heaven, but New England author Scott D. Pomfret combines his experience of both in his writing. Appearing at Borders tonight in sup- port of his new memoir, Pomfret is guaranteed to offer a novel, hilarious perspective. The reading is at 7 p.m.. I