Chess Gambling?

[DanielM]

There is a classic argument as to why there are more professional poker players then professional chess players.

On any given night, a sucker can beat a top poker player but that won’t happen in chess. That false sense of confidence keeps the poker suckers coming back, and the quality poker player's profits coming.

Does anyone have ideas of how to introduce randomness into chess so the suckers keep coming back? The trick is to do this without it being too gimmicky.