If youย’ve ever met any of the girls who skate with the Memphis Roller Derby, you know how hard it is to get them out of their olย’ school four-wheeled skates. If you havenย’t, see for yourself at the Memphis Roller Derbyย’s first all-wheel fund-raiser, a carwash Saturday, May 13th, 10 a.m. to 1 p.m., on Union at Diana. Suggested donation is $5, and even if your thoughts are dirty, your car will be clean.