I recall walking past the
economy bar on a Thai flight BKK-FRA a few years ago, and they had a full bottle of Bombay Sapphire.
The only time I saw miniatures in lounge was in Munich, where a basket of "360 Vodka" was put out. I took a couple. When I went back around 10 minutes later, they were gone, and never replaced! I'm fairly sure the vast majority of them ended up in people's bags, rather than being drunk there and then.