Shortly after midnight, OUR Walmart said workers walked off their jobs in stores in Dallas, Miami and Kenosha, Wis., on Thursday. But a spokeswoman for the group did not immediately give numbers on how many workers participated.For their part, retailers say they are giving shoppers what they want. Dave Tovar, a Wal-Mart spokesman, said that the discounter learned from shoppers that they want to start shopping right after Thanksgiving dinner. Then, they want to have time to go to bed before they wake up to head back out to the stores. Still, Tovar said that Wal-Mart works to accommodate its workers' requests for different working hours. "We spent a lot of time talking to them, trying to figure out when would be the best time for our events," he said. Kathee Tesija, Target's executive vice president of merchandising, said Target's 9 p.m. opening struck "a perfect balance" for its customers. When asked whether it's faced any criticism from Target employees, she noted that the chain also works with workers to accommodate their needs. But, ultimately the company serves the customer. "We thought long and hard about when the right opening time would be," she said, adding that Target "wants to make sure we are competitive." ____ Krisher contributed to this report from Toledo, Ohio and Ann Arbor, Mich.