8 handed, Hero is dealt KQJ6r from BB.
UTG calls, UTG+1 raises, UTG+2 calls, MP calls, CO calls, BTN folds, SB calls, Hero calls, UTG calls.
UTG, MP and SB played pretty tight preflop. Therefore, I figured my hand is somewhat more live than on average, and with high (misleading?) pot odds, I decided to call an extra bet from the BB.
Flop (7 players, 13 small bets after rake): KJ6 with two hearts.
SB bets, Hero raises...
I figured I had a good opportunity to raise a bet from my immediate right and potentially limit the field and improve my winning chances.
Had SB checked the flop, and assuming that:
a) a single bet isn't gonna fold anybody,
b) my hand is worthless against a field unless I improve,
should I check, hoping for a cheap cruise towards the river, hopefully filling up somewhere along the way?
Your thoughts...?

yes even though your hand is horrible you have to call 1 bet more there preflop near enough closing the action

postflop i think raising is too optimistic. the flush draw makes your hand suck a fair bit and there are too many players in to think folding them out is likely. IMO just call and get aggro on a more favourable turn like an offsuit low card.

You played it correctly. You said three of the villains play tight preflop. Is their postflop play also tight? Since literally every turn card that doesn't pair the board hurts your hand...

+) Aces put a straight, two bigger pair, and two parts of a low out.
+) Queens make a straight possible (and potentially make someone two bigger pair).
+) Tens and nines make straights possible.
+) Eights through deuces put a second low card and a straight draw on board.
+) Hearts make a flush likely.

...you have to raise if you have any chance of KO-ing opponents. Low only hands may go away facing two bets on this board, although you're hoping they will call. You'd also like to shake gutshot straight and low flush draws. (The last is a lot to hope for, but against tight players, you owe it to yourself to invest a couple bets here.)

If it's checked to you, I'd check and hope for a low non-heart so I could raise the turn.

-Jogger

I like the raise.

Buzz

The flop raise is fine. There is only one low card so if you fill up, there won't be a low; however, you won't always scoop with a boat and surely if anyone has a set of kings, it will be heard from the flop action and basically fold if there is a cap on the flop since now you either have no outs or tainted outs.

If a heart comes off on the turn that doesn't pair the board, unless it's the ace, you should probably take the river since the pot will be big enough.

Had it been checked to you, checking is okay with the idea of checkraising a late position bet. I don't think betting is horrendous, but sometimes you won't know where you stand if there is a raise; anyone could be raising with AQ2x with nut flush draw or other kinds of hands that have decent equity in a multiway pot. Besides, even if you don't get raised, many possible cards can show up on the turn that can weaken your hand substantially - even a suited 5 to bring two flush draws makes it so that you are basically still looking for one of six cards on the river.

The mentioned tight preflop players are also somewhat tight overall.
The rest are loose and bad, but might respect their money facing a probable jam, holding a poor hand.
Not when I have a Q in my hand.
But also give me a 2nd nut 1 card straight draw, again, using my Q.
But if SB checks the flop, there's no reason for me to expect him to bet the turn. Do you mean attempting a check-raise?