Stop by the Great American Cookie on April 15th to make tax day a little bit sweeter. They'll be giving out 1 free chocolate chip cookie to everyone at their Inner Harbor location who needs a pick-me-up. Here's the official website with more information.
Also, According to CNN, if you sing an entire karaoke song at Hard Rock Cafe on tax day, your entree will be free. Check out that CNN link above for a few other national chain deals as well.
