Eat & Drink Denny’s in Brooklyn is giving away free breakfast By Georgia Kral Posted on May 7, 2015 Sign up for our amNewYork email newsletter to get news, updates, and local insights delivered straight to your inbox! The first Denny’s in Brooklyn is doing something special on May 13. The first 100 guests get a free Grand Slam breakfast! Head to 805 Pennsylvania Ave. before the opening at 9 a.m. if you want the free breakfast. We predict a line.