Hold'em table

J4s is too weak to open from the button for a full big blind; folding preserves chips for better spots.

Cheap price heads-up against BB with a suited-ish connector hand; call the extra 50 to see a flop.

Ace-high out of position against a limper; a small isolation raise builds the pot with a hand that's likely ahead and can win uncontested.

67o out of position facing a raise from the big blind has poor equity and playability; folding avoids committing more chips into a likely stronger range.

AQ offsuit is a strong hand on the button; raising for value and to isolate the blinds.

T6s is far too weak to defend against a 3x open from the button out of position; folding loses only the 50 chip blind.

T7o is too weak to continue out of position against a button open; folding avoids a dominated, poorly connected hand.

6-4 offsuit is a very weak hand from the button with no fold equity established; folding preserves chips for better spots.

Button folded, so this is heads-up versus the big blind. 95s is weak but suited and the 50-chip call into a 150 pot only needs about 25% equity, which this hand clears against a wide blind range.

Q7 offsuit as BB with SB limp-call; checking option is free and Q7o isn't strong enough to raise here.

Nine-high with no pair and no draw has little flop equity, and checking is free. I will see the turn before putting more chips in.

I have Q-high with no pair or draw on an A-K-3 board; no value in betting, so I check behind cheaply.

Pair of nines with a weak kicker is only showdown value on an ace-king board, so I check to control the pot rather than bet into a range that can easily have me beat.

Qd7c with no pair or draw on this board; checking is free and avoids building a pot with a weak holding.

Pair of nines has some showdown value but loses to any ace, king, or queen. Betting folds out worse and gets called by better, so checking is best.

With one pair (Q7) on a scary board where opponents have checked passively, checking to showdown avoids unnecessary risk.

AQs is a premium button hand and I am first to act preflop, so a standard 3x open builds the pot and applies pressure.

7-3 offsuit is a weak hand facing a raise; folding is standard to avoid unnecessary risk.

5-2 offsuit is the worst hand in hold'em and I'm facing a 3x raise out of position with no fold equity worth pursuing. Folding is clearly correct.

K3o is a weak offsuit hand not worth playing even from the button in a 3-handed game; folding preserves chips for better spots.

6h3h is far too weak to play even from the button in a 3-handed game; folding preserves chips for better spots.

45o is too weak to complete or raise out of position after the button folds, so folding the small blind is the lower-variance choice.