Whomever is doing the banker job, whether that's the host or another person, should be the soberest of them all because of the duties it entails.
Don't take this as being a total teetotaler but you might consider cutting back on the booze a bit. People should not be leaving your house "wrecked." We drink and have a good time but nobody gets hammered and then drives home.
Beyond the obvious problems with your buddies being wrecked on the road, it could come back to you. If someone causes an accident there's a lawyer waiting to name the host as a co-defendant because the real reason their client's kid is hurt/dead is because of the host's illegal casino. Not just a party at some guy's house, but good god. A casino, with real chips, a legit table, and big stakes being gambled!