[peritonlogon]

just out of curiosity, why is check/folding a bad play (assuming that there is at least on other caller)? It looks like there are 15-16 bb in the pot right now... I don't think he would be up often enough to call here, since,
-he check-raised on 4th with a 2 flush board, paired on 5th and got 3 callers on 5th AND 6th
-There are no dead queens (for villain 4) (2 live 7s as well) or Aces (for villain 1) (3 live 6s as wel) plus the three nines for villain 3. So 2 out of 3 straits are extremely live and the gut-shot board is still sort of live (and he's been calling).
-Flush draws are also possible in all 3 cases.

It would seem that, to get pot odds on an over-call, you would have to be in a room full of seriously stupid people who also hated money (which may well be case).

As far as letting a possible 2 pair off cheaply on the river, this might be a spot to do it.