Place eight 16-ounce glasses or mugs in the freezer.
In a small saucepan, combine sugar and 3/4 cup water over medium heat. Cook, stirring, until sugar dissolves, about 1 minute. Refrigerate until cool, at least 10 minutes and up to 1 week.
In a 2-cup liquid measure or small pitcher, combine sugar mixture and lemon juice. Pour 1 beer into each chilled glass; add about 1/4 cup lemon mixture and, if desired, a lemon wedge. Serve immediately.