Poker is a card game of betting that involves two personal cards in your hand and five community cards on the table. Your best poker hand is a pair of matching cards or better. Ties are broken with the highest card.
When you play with more than 10 people it is common to have separate tables. Having more than one dealer can slow your hands per hour, and can lead to unbalanced games where players call raises from other players even though their own hand is strong. If you win a hand, tip your dealer about $1 for small pots and up to $5 for larger wins. It keeps the vibes at the table up and is a nice way to show your gratitude for his/her role in your success.
A good poker player is a master at reading other players and exploiting their weaknesses. This is done with a variety of tools, including behavioral dossiers on other players, data from poker software and in-person cues like eye contact and body language.
A good poker player is also a master at bluffing. This can be a simple as changing the way you look at someone or as complex as using your body language to indicate that your hand is weak. Every player has a tell, but the most successful players have a few unique ones that are consistent with their overall style.