Friday,  August 23rd Insomniac presents Nitti Gritti at Exchange LA 618 S. Spring St, LA CA 90004 Event is 21 & over. Dress code is strictly enforced. No sandals or flip-flops, no shorts or baggy jeans, no plain white t-shirts or tanks and no sleeveless shirts. No hooded sweatshirts or jerseys. No baseballs hats or beanies. Jeans and tennis shoes are OK.