According to Beer Menus it is on tap at Valhalla.
If you like pumpkin beers you would probably do best at one of the good beer bars around town that usually have a lot for you to try around this time of year. Blind Tiger, Rattle n Hum, DBA, David Copperfields, etc.... Other pumpkin beers you might like are
Southern Tier Pumking --Tastes like liquid pumpkin pie.
Captain Lawrence Pumpkin
Sixpoint Pumpkin (they made two batches this year, one with fresh and one with canned pumpkin
)Brooklyn's Post Road Pumpkin
Eylsian Fields out of Washington that makes at least 3 different pumpkin beers including a delicious stout
Fisherman's Pumpkin Stout
Last year around Halloween Blind Tiger had a pumpkin beer event which had somme really rare varieties of pumpkin beers. Check their website to see if they are doing it again, I am guessinng Wed Oct 27th but could be wrong.
281 Bleecker St, New York, NY 10014
1394 York Ave, New York, NY 10021