Casino caveat: As a veteran blackjack player, I feel compelled to warn others that, often times, low-stakes blackjack tables offer a lower payout for a two-card 21 than high-minimum tables.
DETAIL: Typically, a two-card 21 (blackjack) pays 3:2: For every $2 wagered, the player wins $3.
EXAMPLE: On a 3:2 table, a $5 wager would pay $7.50.
CAVEAT: However, some casinos are offering low-minimum blackjack tables that pay 6:5. That means that the same $5 wager would win just $6 on a blackjack.
In the past 10 years, the only place I've seen low-stakes, full-odds blackjack is at a casino in Reno, NV.
The blackjack payout odds are typically posted on the table. So look for that.
For those interested,
here is a more comprehensive explanation.