KK in SB - UGLY flop

[Hojglad]

Table is full of loose passive players, just like a typical Party table. What would you do on this flop? I checked to open the action because the board was just THAT ugly.

Party Poker 0.5/1 Hold'em (10 handed) converter

Preflop: Hero is SB with K[img]/images/graemlins/spade.gif[/img], K[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">2 folds</font>, UTG+2 calls, <font color="#666666">1 fold</font>, MP2 calls, <font color="#666666">1 fold</font>, CO calls, <font color="#666666">1 fold</font>, <font color="#CC3333">Hero raises</font>, BB calls, UTG+2 calls, MP2 calls, CO calls.

Flop: (10 SB) A[img]/images/graemlins/club.gif[/img], 8[img]/images/graemlins/club.gif[/img], 5[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(5 players)</font>
Hero checks, <font color="#CC3333">BB bets</font>, <font color="#CC3333">UTG+2 raises</font>, <font color="#CC3333">MP2 3-bets</font>, CO calls, Hero ...