Traveling on DL BE, we were able to use Czech Air's lounge, comfortable, but I think the only beer was bottled, Pilsener Urquell, IIRC, but maybe Gambrinus. It was a morning departure, the sun only beginning to top the yardarm, so I was on coffee and brandy.
In a country where draught beer is generally available, and in almost every case, "fresh" from the kettle, I avoid the lesser appeal of bottled beer. I do not remember a bad (or other than satisfying) glass/mug/stein of beer in nearly two weeks of continuous consumption. Mid-morning, lunch, mid-afternoon, cocktail hour and dinner.....(and early to bed - Prague restaurants are not the late hours sort).
The best? The "Moritz" from the Moritz mini-brewery and restaurant in Olomouc.
Among the Czechs, it seems that dark (Helles?) beer is for girls and the weak of heart, whilst real men drink pilseners. The local "Black and Tan" ain't bad, just semi-effeminate.