Barton G's cuisine has always been about pushing the envelope, and now, thanks to cutting-edge molecular mixology, the cocktails at this crazy popular South Beach restaurant are over the top, too. The Below Zero Nitro Bar utilizes liquid nitrogen to manipulate the temperatures, textures, and tastes of mixed drinks. Our favorites are the Classic Nitro-tini Ciroc Vodka, garnished by a frozen vodka swizzle stick and frozen pearls of olive juice and blue cheese; and the Pink Elephant Nitro-tini, with an Absolut Red Vodka popsicle for swirling through ruby red grapefruit juice and fresh grapefruit segments. All nitro-cocktails have a high potency score, given that frozen alcohol is used for the ice cubes (not frozen water, which dilutes a drink). The future is now, and only available at Barton G.