Slots are entertainment, not investment. They generate the majority of casino revenue because the house edge (3–8%) is significantly higher than table games. Play them for the experience and jackpot potential — but understand that over time, you will lose more per dollar wagered on slots than on any table game.
Blackjack and video poker are the efficiency picks.With optimal strategy, both offer RTP above 99% — meaning you lose less than $1 per $100 wagered. But "optimal strategy" means using mathematically correct decisions on every hand, not guessing.
Live dealer is an experience choice, not a math choice. The RTP is identical to RNG versions — a live blackjack hand has the same house edge as a computer-dealt one. You are paying for the social experience.
Roulette: European > American, always. American roulette has a 5.26% house edge vs. 2.7% for European — there is no strategic reason to ever choose the double-zero wheel.