Treasury in Las Vegas had an advertising give-away
called "Catch 22." You got a special card
from the casino cage, hotel desk, or a floorman, and
this card gave you a push on 22. The limit was one
per day. If you doubled down on twelve and busted,
the Catch 22 card saved your entire bet. You kept
the card until you needed it; i.e. you did not turn
it in until you wanted to save your bet on a twenty-two.
This card was worth 100% of a bet, slightly more if
you doubled down on twelve against 2 through 6. The
maximum bet was $200.
process of changing seats differs widely among cardrooms.
In some, particularly smaller clubs, if a seat opens
up, whoever gets there first gets the seat. Sometimes
players claim seats by tossing chips to the empty
seat. In such case, the player first to throw a chip
gets the seat.