Only an hour after opening this morning, the mixed crowd of laughing locals at Walt’s Crypt were thick as fleas on a dead gutterpunk, moving irregularly over the smooth ice of the oval rink, going round and round. Sitting comfy in his office, Adam Two Bears watched the patrons on the other side of the huge Armorlite bulletproof window struggle to stay upright, while kids over at the counter happily munched on ice cream cones dished out by his nephew and niece, and a score of oldsters just sat on benches sucking up the AC and luxuriating. It was going to be another blistering day in Miami, and that meant lots of biz.