I was thinking about this. Out of all the themes for an episode that Seinfeld had over the years, it would have been funny to see Jerry, Elaine, Kramer, and George gamble in a casino in Atlantic City or Las Vegas.
This is how could see it going...something like this...
If Jerry loses any of his money, he would always make in fun of the dealer.
When Elaine went to play, she would always pick a table with a good looking mail dealer and flirt with him whether she won money or not.
George would always lose, no matter what he played and in frustration, he would try to take his chips off the table when a dealer was not looking (and end up spending a night in jail).
And Kramer would yell all over the casino when he won and with all his luck, he would end up rolling at a Craps table for hours before sevening out. People would be winning lots of money off of him and then he would get people taking him out and offering to pay for his hotel room and drinks.