I wanted to see whether these places stuck to their word, so on July 14 - my 23rd birthday - I schlepped across Manhattan with my coworker Arielle Berger, who was also celebrating her birthday in July, to see what I could accumulate.
A bit of planning is involved if you want to rack in the freebies. Most places require you to sign up for their email club or rewards program at least a week before your birthday (I registered three days in advance, which cost me in some situations).
We stopped at 15 places overall and had a pretty impressive success rate. Here's how the day went: