Baseball season includes twice as many games as pro basketball and 10 times as many as pro football. And Mark McGwire and Sammy Sosa can play on only one team each. To encourage repeat business, major and minor league teams have devised some creative promotions this season:
--Laundry Night (Charleston River Dogs): free laundry service during the game
--Fishing Rod Night (Minnesota Twins): anyone wearing waders admitted free; fishing poles given to the first 5,000 people
--Computer Geek Night (Colorado Springs Sky Sox): free admission for those named Chip or Mac or with the initials PC; look-alike contests for Dilbert, Bill...