Have a Drink on Mr. Gehrig, Or Maybe Not...

Ran across this interesting item the other day:

Lou Gehrig Free Drink Card from 1929

Looks pretty cool, but I'm a little skeptical on the authenticity. Seems odd to me that a bar and grill would offer a coupon for a (presumably alcoholic) drink in print right in the middle of prohibition (1920-1933). Also one of the fine posters on the PSA boards pointed out the following link that shows the current building at 93 Starr St. was not built until 1931.

93 Starr St. Building Record

There could have been a previous building there, but still another point to be skeptical about. I couldn't find anything about this card on the web. I did see someone saying that they had a Babe Ruth card like this with the exact same promotion on the back, but they were asking if anyone knew anything about that card as well. Anyone know anything about this card?