I think the sports book would be your "best bet" in finding a winner, although the return on your wager would be significantly reduced. You would not double your money wagered by any means. Maybe a parlay with teasers, but that's going to be difficult to handicap. A big favorite may not pay much on a money line.
If only one bet, I'd play the "Don't" at craps for a minus EV of 1.36%. You can get a better edge at Blackjack, perhaps in the 0.47% range with "perfect strategy", but that percentage would include being able to double, split, DAS, etc, so the house advantage would not be that low. I don't know what it would be based on the flat bet only scenario you describe, and it may be less than the DP at craps.