IPlay
Bum hunts 25NL
Silver Level
Since I am 9-max specialist I will only talk 9-max.
On passive table, From UTG-1 to MP-2, limping is definitely good, raising would just make people all risk more and confuse you because now people in BB, SB may 'superraise' to iso-bet and you are on backfoot as you have 0 reads which is what you really are paying for preflop, the ability to know you are not against some weird hand like 8 5 to better narrow down where you stand vs opponents once the flops gets there but on loose-pass PF tendency tables you should just limp with something like A 10.
From MP-3 to Dealer, if many have called, limp but if you notice it's less than usual and only 2 or so have limped, go ahead and raise a little, this may actually mean more once flop hits as they are responding TO YOUR actions much more than out of fear or greed towards the general cards which most passive fish do in many-men flops. In SB or BB, you have the best analysis of just how many are in the hand, never iso-bet with a loose passive crowd preflop, only raise with few (as I said).
With aggro tables total opposite strategy should be taken, you are going to unleash a cork in an exploding champagne bottle if you start raising into LAG people who have suddenly enabled you to get a cheap view at the flop if you're in a position ranging from cut-off to BB but from UTG-1 to MP-2 you should be raising just to discourage a few would-be reraisers who dont fear YOU but the aggressive psychos after them) see how it works?
I'm pretty sure this is the play of every Old Man grinder I have seen in live 1/2 games.
This is why after 40 years of poker, they still play the lowest stakes available