Hold'em table

Button raise with a playable suited-ish connector-like hand to take initiative in a 3-handed pot.

QJo in the small blind facing a 2.5x button open in 3-handed play is a reasonable call; it's too strong to fold against a wide button range but not strong enough to 3-bet comfortably out of position with the big blind still to act.

T-J offsuit is a weak holding in a 3-way pot facing a raise and a call. Folding preserves chips against better-positioned opponents.

Out of position with QJ high on a low 3-7-6 board that misses me completely; checking to the preflop raiser is standard and lets me see their action before committing chips.

I have an open-ended straight draw (8-9 with 6-7-3 on board) and want to apply pressure with a continuation bet against a check.

Queen-high with only two overcards and no draw on a low connected board, out of position against a button open and c-bet; calling 300 into 900 with ~6 clean outs and poor playability is -EV, so fold.

T2 suited is too weak to open even from the button in a 3-handed game with 100bb stacks; folding avoids playing a dominated hand out of position postflop.

T7o is a weak hand in early position after the big blind has raised to 100. With only 50 more to call and a marginal holding, folding preserves chips for stronger opportunities.

6-7 offsuit is a weak hand in early position. Folding preserves chips and avoids marginal situations where I'm unlikely to win without significant improvement.

Cheap call heads-up with a live hand; pot odds justify seeing a flop with J7o versus just the big blind.

Button folded and the small blind limped, which caps their range as weak; Q6o has decent equity heads-up in position for the rest of the hand, so an isolation raise takes the pot often and builds a pot I can play with positional advantage.

J7o offsuit is weak against a raise; not worth calling 200 more out of position.

34o offsuit is a weak hand not worth entering a pot with from the button facing a raise; folding preserves chips.

Button folded, so it's SB vs BB heads-up; T8o is a reasonable raise from the small blind in a blind-vs-blind spot with 100bb stacks, applying pressure with position disadvantage mitigated by fold equity.

AJ is a strong hand with excellent potential. Seat_2 raised from small blind to 300, which could be a wide range. Re-raising to 900 (3x their raise) applies pressure, defines hand strength, and gives me the opportunity to take down the pot or play from position with a premium holding. This aggression is justified given my strong hand and the positional advantage as big blind.

T8 offsuit facing a 3-bet out of position is a clear fold; the hand plays poorly against a 3-betting range and we lack the equity or playability to continue.

A7o on the button in a 3-handed game is a standard open; raising to 2.5bb takes initiative and pressures the blinds.

3h-Js is a weak hand that struggles against a raise. Folding preserves chips when out of position with poor hole cards against aggression.

T2 offsuit facing a raise with a player already folded is not worth defending; folding preserves chips.

Only 50 to call with a suited speculative hand heads-up against the big blind; pot odds justify seeing a flop cheaply.

J7o in the big blind vs a small-blind limp; checking is free and raising a marginal hand out of position isn't needed. Take the flop.

No pair, no real draw (only one club), so I check behind cheaply and look to see a free card.

Limped pot heads-up, SB checked to me. I have a gutshot (8 for straight) plus overcard J; a half-pot bet takes down the pot often against a limp-check range and has equity as backup.

Weak hand with no pair, draw is minimal (just club backdoor), facing a bet - not worth continuing.