If someone is trying to cut back on alcohol consumption I don't think that's necessarily good advice. Sweet drinks like lemonade are so easy for me to suck down without thinking.
Hot beverages are a lot harder to suck down. I try to start most mornings with a hot cup of sencha or oolong tea, but there's a lot of good, hot options like chrysanthemum, ginger, or lime.
Personally speaking, the carbonation in shandies prevents me from chugging them down. Besides, when I prepare them myself I tend to water down the mixer a bit, otherwise they end up being a little too sweet to my taste.
I strongly prefer DIY lemonade, exactly because I've got full control over the sweetness. (and throwing in a few fresh mint leaves is a nice touch, too..)
Just pick up a small bottle of 100% pure lemon juice, add about a half the bottle to a quart of water, ymmv, and whatever (brown!) sugar and other stuff you want.