Wednesday-Thursday: You loved to hate her as Nellie Oleson on "Little House on the Prairie." Now Alison Arngrim, who portrayed Laura Ingalls' nemesis, has a book and a club act about her experiences. Arngrim will be at the Camp Bar in St. Paul this week with "Confessions of a Prairie Bitch: How I Survived Nellie Oleson and Learned to Love Being Hated." Arngrim, a writer and stand-up comic, dishes in her act about co-stars Michael Landon, Melissa Sue Anderson and Melissa Gilbert. Arngrim and Gilbert were and are real-life best friends. Arngrim grew up in Hollywood; her father was Liberace's talent manager and her mother voiced Casper the Friendly Ghost, Gumby and Davey of "Davey and Goliath." (8 p.m. Wed.-Thu. $29.50-$49. Camp Bar, 490 N. Robert St., St. Paul. 1-800-838-3006 or www.brownpapertickets. com.)