If they just play for fun then at least when they get the win, they are willing to spend the money from the winnings for something that can be enjoyed together like eating or other things that will ultimately make everyone feel enjoy after betting. That's what I usually do when I'm just gambling for fun. But in fact some of my friends did not do that, while at the same time I asked things like "what are you gambling for" then he answered "just for fun" but he didn't show me something I said earlier.