Yeah, I always just leave the odds bit the same but you choose your stake and then the liability is what you pay out if the bet loses (so you lose more than regular bets when you lose) and payout is profit. Profit makes it look tempting but I should probably leave it alone with that liability
Yeah should definitely be left just for fun/you should have a small ish amount you're okay with losing for casino games. I still don't know
anything about blackjack (even less than poker), just reminds me of the sweets

It's one that is completely luck based? I know
exactly what you mean by foggy memory

Like when you have to think hard about it to only kind of remember doing it. It's true, I bet they get hella drunk people in those places, it's the same for the shops down the road too, in one place I stayed in London there was a Wetherspoons right opposite a couple of betting shops and the guys used to go hang out there all the time after a few drinks.
