Skat is the most popular German Card Game. It's always played by three folks - if there are more, some of them will have to sit out in some rounds, or you'll have to split the group if there are more than five. The game is several centuries old. In terms of strategy vs. luck, it's more on the luck side than Texas Hold'em Poker - meaning that a good player who knows about strategy will have an edge over lesser players, but not as much as in poker. It is often played for money, though not much - less than one cent per point, usually. Ideally played at Der Stammtisch.