how to make a Shandy

honestly, the fresh lemonade at Yankee Stadium has gone downhill. It used to taste of lemon, now it tastes of syrup. and by 'now' I mean, for the past 2 or 3 years. not that that stops me from getting them, and adding light beer to make a delicious shandy.
fresh lemonade at Yankee Stadium costs $4.75, same as a hot dog. yes that is a very green lemon, not a lime in there.