Pocket Kings in the hole--but I'm playing the board. Help!

[Clinger]

Live 2/4 at Showboat AC. 10 Handed.

Table is very bad in terms of profitability--I only played maybe 2.5 orbits then got up and headed elsewhere.

No particular reads at this time on any of the players, other than that they didn't seem like complete donks. As a whole there's usually only 4-5 players to a flop and the table is not very passive (which is why I left).

Hero is CO with K[img]/images/graemlins/diamond.gif[/img]K[img]/images/graemlins/heart.gif[/img]

UTG calls, UTG+1 calls, UTG+2 calls, 3 folds, <font color="red"> Hero raises</font>, Button and blinds fold,, limpers all call.

Flop (4 players, 9.5 SB): 2 [img]/images/graemlins/spade.gif[/img] 3 [img]/images/graemlins/diamond.gif[/img] 6 [img]/images/graemlins/club.gif[/img]
3 checks, <font color="red"> Hero bets,</font> 3 calls.

Turn (4 players, 6.75 BB): 5 [img]/images/graemlins/club.gif[/img]
3 checks, <font color="red"> Hero bets,</font> 3 calls.

River (4 players, 10.75 BB): 4 [img]/images/graemlins/diamond.gif[/img]
<font color="red">UTG bets</font>, UTG+1 calls, UTG+2 calls, Hero...?

I'm playing the board here. Does no one have a 7 often enough for me to call for 1 bet?