This is no ordinary happy hour with bargain beers or cocktails after work. This is a FREE open bar happy hour at Jay-Z’s trendy 40/40 Club. Every Friday, get FREE drinks between 10 p.m. and 11 p.m. But you can’t just walk in. This free happy hour requires that you register your attendance so your name is on the list to get you beyond the burly bouncer at the door. But it’s also free to RSVP. Be sure to tip the bartender. Jay Z’s 40/40 Club Manhattan is at 6 West 25th St. in the Flatiron district.