UM St. Patrick's Day Poster Explained

Well, we read some of the responses on the latest UM poster Jeff and Johnny Thief have done and think maybe we should start regularly explaining the imagery on our posters when they are released.
Jason K came the closest:

1st) Luck of the Irish (gambling luck)
2nd) St. Patrick drove the snakes out of Ireland (though likely a metaphor for bringing Christianity to Ireland and driving out the pagan religions)
3rd) Pay it. (snucka)

but missed the other factor of the band's fondness for Texas Hold'em. They've hosted a game on Jam Cruise the last 3 years that we know of..... and the poster is GREEN for St. Pat's.