live hand--how good of a read do I need to fold this?

[Walker]

BB is is a Lee Jones disciple. He's tight/slightly passive pf, and really ABC post flop.

UTG+1 is very loose and does all sorts of weird stuff. A couple of times he check raised (in multway pots) bottom pair+bdfd type draws and TPNK when he's obviously behind (he checked the next street so he wasn't semibluffing)

UTG+2 is a fish

6 limpers, I limp on the button A [img]/images/graemlins/club.gif[/img]T [img]/images/graemlins/heart.gif[/img], blinds call

(7.25SB)Flop: 3 [img]/images/graemlins/club.gif[/img]4 [img]/images/graemlins/club.gif[/img]6 [img]/images/graemlins/club.gif[/img]

checked to me and I bet, blinds call, UTG raises, UTG+2 calls I 3 bet, everybody calls

(9.5 BB)Turn: 4 [img]/images/graemlins/spade.gif[/img]

BB bets, everybody calls.

(13.5BB)River: 9 [img]/images/graemlins/club.gif[/img]
BB bets and everybody calls

Under what circumstances can I fold this turn?

Edit: BB is loose from the blinds
(I added the pot size)