I'm a little late in getting this one out, but the Ginger Man has released their list of Glass Nights for the month of March:
2nd - Shiner
9th - (512)
16th - Real Ale and Guinness (Heritage Glasses)
23rd - Saint Arnold
30th - Franconia
The glasses are available starting at 5:30pm and only one glass per person with purchase of the beer of the day. As always, the glasses are subject to change and only available while supplies last.