In this subtropical oven we call Miami, a cool snack can be as short-lived as a snowball in, well, the Sahara. Not to worry, though. Smoothies from Lemoni Café — a cozy Argentine- and Moroccan-owned sidewalk sandwich shop on NE Second Avenue just north of the Design District — won't sit around for long. They're too tasty. Try the 20-ounce honey-peach-mango with soy milk for $4.50. It's sweet (but not too sweet), velvety (think less icy than Jamba's), and strangely comforting. Opt for the simple, more traditional fresh raspberry or orange if you want something tart and tangy. The place has a jovial neighborhood vibe — with free wireless Internet and flowing conversation — and you'll likely leave feeling a few degrees cooler.