This from the "pure whimsy" file: there appears to be an entirely wholesome war of names going on at two bodgeas on opposite ends of the same block in East New York. At Pennsylvania and Belmont, you finds the Green Mountain Deli (maybe founded by a transplanted Vermonter?). Walk a block down on same (east) side of the street and you'll hit the Red Mountain Deli at Sutter and Pennsylvania.
I didn't ask about the names, but I wondered. The Green Mountains are, at least to my New-England-raised ears, a fairly well known mountain range. There is a Red Mountain in Colorado that technically could be a range (it's composed of three peaks), and another in British Columbia that houses a ski resort. The Columbia Gazetteer of North America credits the name to a small range in Wyoming. Still, I think it's a relatively safe, if totally unexamined, assumption that the red deli is the derivative.
Oh, and down the street you can hit up the "Green Land" Deli, which I hope against hope carries this beer.