Halalapalooza. The Halal Guys, a New York City chain that has found its newest home at 906 Chapel St., will host its grand opening from 11 a.m. to 11 p.m. today. The first 100 people to line up outside will get a free platter of the restaurant’s famous Middle Eastern food. The owners’ tip? “Add a lot of white sauce, but be very careful with that hot sauce.”