To-Go Margaritas Now a No-Go at El SombreroIs it time to pour one out for Lower East Side nightlife? Recently we let an out-of-towner in on the neighborhood “secret” that hipster slum spot El Sombrero (The Hat) has long served their potent frozen “crackaritas”* to go. Shockingly, when we told our bartender we’d have the usual, he informed us that as of about a month ago the restaurant had ceased serving the potent concoction. Maybe it had something to do with the police van parked across the street? Wondering whether an A-list customer would have better luck, we sent food publicist Aimee Bianca to ply her charms.