If you are looking to throw in a couple of games to break up the seriousness, I'd go with Indian Poker (not a very PC name, I know) or Screw Your Neighbor.
Just in case they are new to you:
Indian Poker (my version, there are others, but you get the idea):
One card is dealt to each player, face down - no one can look at the card. The card is then held against your forehead, so that everyone can see it but you. First round of betting takes place. A second card is dealt to each player, face down – no one can look at the card. The card is then placed on your forehead next to the other one. The second and final round of betting takes place. The winner is the person with the either the highest pair, or the highest card w/kicker. Best hand possible is two Aces.
Screw Your Neighbor:
Three stacks of money are placed in front of each player. It depends on the stakes of game you are playing, but I would go with $1 pile for low stakes or $5 for mid-size. One card is then dealt to each player, face down. If you have a K, it is automatically flipped over, as it is a safe card. Starting with left of the dealer, the person gets to decide to keep their card or trade with the person to their left. If they keep the card, it then goes to the next person and they decide if they want to trade or keep their card. If the person to your left wants to trade you, have no choice – unless they have the K. If the K is flipped up, you are screwed and must keep your card.
This keeps going till it gets back to the dealer, who can choose to keep his/her card, or “hit the deck” and take the top card on the pile. Once the dealer has decided, all cards are turned over, and the person with the lowest card pays one stack (to the pot). Card order goes from Q -> A, and the A really screws you, as you have to pay two stacks. If two people at the table have the same lowest card, they both pay a stack. Game keeps going until only one person has any stacks in front of them – they win the pot.
The deal rotates throughout all players (with shuffling between each round), until the game is over. This way, the starting position changes. It is a really fun game, and pretty quick to learn, once you get the hang of it. It’s great to watch the first players A, go all the way through the table, being traded from player to player – getting all the way to the dealer. It’s even better when the dealer hits the deck, only to get another A. The other great thing is to have a low number card – like a 4, and have someone trade you a 5. Unless that card gets over-turned by the dealer, you pretty much you are safe that round.
If a person fails to flip over the K, they must put all remaining of their stacks in the pile.
Hope those makes sense.