Mild-mannered by day, wild by night, River City Ale House, owned by Mr. John Del Grand, is a well- frequented and much-admired Main Street milieu. During normal business hours, green linen-topped tables welcome you, and a long menu of vital victuals like wraps, salads, burgers and fresh fish will fill you up at very reasonable prices. But at the witching hour, the green linen is traded in for the sexy green felt of billiard tables, and business attire is replaced by Friday night Buck Nights (when all drinks are $1), Wednesday night Ladies Nights, and a big fat disco ball. The 2,000-square-foot dance floor and the oodles of cheap drinks make this place a lively local nightspot, as well as a favorite place to grab a hearty lunch. And, of course, you should sample the proprietary brews.