What to do...

[mishafp]

Button is a very loose pre-flop player who will call with anything and raise with marginal hands (J10 or better is usually a raise). BB is a tighish calling station, who is usually pretty bad, but has been playing pretty well tonight, as far as i can tell (he beat me in the finals of our tourney before this cash game, and he played the heads up very nicely). Blinds are .25/.50 and 2 dollar has been my standard raise all night. The table is now 6 people.

Hero is in CO with 55 dollars
Button has 20 dollars
BB has 100 (thanks to me taking money from other players and giving it to him all night).

I get K [img]/images/graemlins/spade.gif[/img]J [img]/images/graemlins/club.gif[/img]. I give it my standard raise to 2 dollars- button min. raises to 4 dollars, BB calls, I call.

Flop comes K [img]/images/graemlins/diamond.gif[/img],10 [img]/images/graemlins/heart.gif[/img], 2 [img]/images/graemlins/club.gif[/img]
BB leads out for 5 dollars, HERO ???

I know I will be told "fold pre-flop", but given how loose this game is pre-flop, and how bad most of these guys are post-flop, I play these kinds of hands this way for EV+ most of the time. So anyway, you can tell me to "fold pre-flop" but I am mostly interested in the post-flop move. Is calling just stupid, and i should either re-raise to see where I am at or fold? I havent seen this guy lead out all night, but his bet is less than half the pot...