Urban myth has it that on every corner up North there's a bar waiting to warm up its shivering patrons with alcoholic libations. Wouldn't it make similar sense for every block in Miami to have an ice cream shop waiting to shiver up its customers instead? Is opening a beer bottle so much easier than scooping out Rocky Road? The folks at Cold Stone Creamery sure don't make it seem that way. This rapidly growing chain is making inroads into the competitive Miami market with some remarkable innovations. Ice cream creations are made to order on a frozen granite slab. Ingredients are freshly mixed into whatever base you select. If you like the results, tip your chef and listen to the entire crew belt out a song of praise for you. Imagine auditioning for an afterschool job here. Brrr.