If you don’t check beforehand, it’s unlikely that the local SWAT team will raid your house (and if they did, you up your party reputation significantly). It’s also an incredibly frugal party, My budget for poker parties is $50.00, but I normally spend much less than that. By making it a tournament, you’re teaching those new to the game how to play in a tournament in case they ever have any interest in playing in a casino, you’re donating $10.00 to one of your friends (or yourself!), and your giving people an opportunity to gamble $100,000 (in chips of course!).
You can mix social circles that would ordinarily make for an awkward party, put them at a poker table together and suddenly everyone is best friends for life.
My absolute favorite party to throw is a poker party.