Find a single-zero roulette table and only bet on red or black, don't vary your bets, just bet the same amount on every spin, and enjoy your free drinks. House edge is about 2.7%
2.7% is huge.
Find a blackjack table that stands on all 17's, double on anything, surrender available and split 4 times. The get a pocket card that tells you what to do in every instance. House edge is about 0.15%. Order some otherwise expensive free drinks and you are good to go. :grandmais
Hate playing blackjack at a full table. Always get a goof on 3rd base who hits on 15 when the dealer has a 4 showing because they feel lucky. I like three-card poker instead.