Ingrid C.
Yelp
This is, in my opinion, the best liquor store on 5th Avenue, possibly even in all of Park Slope. And I'm a drinking professional.
This isn't your typical wine boutique that's trying to capitalize on all the stroller moms with money. This place has been here for decades, when the neighborhood was still a sketchy place to be. There's no glam here.
They're neighborly ("look at our new lotto machine!") and they've got a great selection. Yes, they do carry things like Yellowtail, Berigner and all that mass-produced crap, but they cater to all. They have something for everyone, and their prices are great. For example, I was in love with this Oregon Fume Blanc that I bought elsewhere for $14 (just down a few blocks). They had it here for $9.99. I don't know how they do it, but they do. I also know that they have a pretty good whiskey selection as well - not that it's super amazing, but I've seen things here I haven't seen at Astor.
Plus, they have the biggest selection of mini-bottles I've ever seen. I know, I know, that's not usually a plus, since it tends to attract vagrants and drunkards. But they have minis of liqueurs and spirits that I've never seen in that size before - a good investment if you want to try something before you buy a full size (Killepitsch, St. Germain).
Did I mention they deliver? But whatever. You needed to go to the Key Foods across the street anyway.