Here's a way to figure out what it will cost you to play. Note that EV, or expected value, isn't the same as the actual results you will experience, but represents an average over time. You're unlikely to hit your EV during any one session, or even group of sessions.
First of all, calculate your average bet. Then multiply that by the house advantage for your particular game; multiply that by hands per hour to get the cost per hour.
For instance: double deck, $15 minimum (our intended average bet), 3:2 BJ, full table (about 60 hands per hour). House advantage with perfect basic strategy: (.65) x $15 x 60. You are betting about $1000 an hour (because of double downs and splits) and figure to lose 6.50 of that.
Your average bet is $25. You are betting about $1700 an hour and figure to lose about $12.
Same as above, but you play inaccurate basic strategy. 2% house edge, your losses are tripled. $36 an hour,
Same as above, but you play lousy basic strategy. 4% house edge, your losses are x6. $72 an hour.
You play 6:5 Strip crapjack. You play perfect Basic Strategy. You're still fighting a 2% edge. Or...you play inaccurately. 4%. Or you play like a lobotomized baboon. 6%!!
So people sitting at a 6:5 Strip $25 minimum BJ table who don't know what they're doing are bleeding over $150 an hour!! Even if they DO know what they're doing...$50 an hour.
Also...if you're not at a full table,. hands per hour goes up proportionately, and so does your cost.
It's an expensive fucking game unless you play where there are good rules AND you play well. So only play the good games, and learn and follow Baisc Strategy perfectly. Play only at full tables. The BJ table is one place where ignorance and stupidity have a direct, quantifiable cost.