As if this town doesn't already have enough of them on the streets and in the clubs, a shark bit a man in the behind off of the ritzy W Hotel at 22nd street today. This one is new for South Beach; alligator attacks are not unknown, but sharks in the warm waters of South Beach?  For one, I know that as much as I have chummed the waters off of Mr. Stuyvesant-Fish"s seaside villa, I have never got more than a blow fish to come near her tough hide.  Oh well, it is probably yet another result of global warming; chalk one up for the Republican denialists.