I suck at playing on the river.

[SparkyDog]

Party Poker 3/6 Hold'em (9 handed) converter (http://www.selachian.com/tools/bisonconverter/hhconverter.cgi)

Both other players are too loose and too passive.

Preflop: Hero is MP1 with Q/images/graemlins/spade.gif, K/images/graemlins/diamond.gif. CO posts a blind of $3.
<font color="#666666">2 folds</font>, <font color="#CC3333">Hero raises</font>, MP2 calls, <font color="#666666">3 folds</font>, SB calls, <font color="#666666">1 fold</font>.

Flop: (8 SB) K/images/graemlins/spade.gif, J/images/graemlins/spade.gif, 6/images/graemlins/heart.gif <font color="#0000FF">(3 players)</font>
SB checks, <font color="#CC3333">Hero bets</font>, MP2 calls, SB calls.

Turn: (5.50 BB) A/images/graemlins/club.gif <font color="#0000FF">(3 players)</font>
SB checks, <font color="#CC3333">Hero bets</font>, MP2 calls, SB calls.

River: (8.50 BB) 9/images/graemlins/diamond.gif <font color="#0000F.F">(3 players)</font>
SB checks, <font color="#CC3333">Hero...</font>
Final Pot: 10.50 BB

My thinking was that someone almost certainly has at least an ace. So, what line should I be taking with this river?

[MoreWineII]

I think a river check is fine. I can't think of too many hands that will call you here that you can beat.

[Lmn55d]

try Kx, Jx, gutshots that hit a pair of 9s on turn, etc. A significant percentage of people will bet out their ace, so since sb didn't bet it's less likely he has one. I think this is a definite bet. Also, if both opponents call (not too unlikely) you only need to have the best hand one in three times.

[MoreWineII]

You really think Jx or a pair of nines is going to call this river? C'mon.

[Lmn55d]

yes, a good amount of time they will. THese players are absolutely horrible.

[MoreWineII]

I need to find those players then.

[BaronVonCP]

I'm not saying that this is a 100% bet...

But if you haven't played on partypoker if you haven't seen a lot of players call on this river with a worse hand.