Low suited cards hit flush, how to proceed?

[InfectGadget]

25 NL @ Party

Total number of players : 4
Seat 6: MP1 ( $25.43 )
Seat 4: Hero ( $26.55 )
Seat 5: BB ( $28.10 )
Seat 2: Button ( $7.15 )
Hero posts small blind [$0.10].
BB posts big blind [$0.25].
** Dealing down cards **
Dealt to Hero [ 6 /images/graemlins/club.gif 3 /images/graemlins/club.gif ]
MP1 calls [$0.25].
Button calls [$0.25].
Hero calls [$0.15].
BB checks.
** Dealing Flop ** [ 5 /images/graemlins/club.gif, 7 /images/graemlins/club.gif, K /images/graemlins/club.gif ]

So: how should one proceed on a flop like that, in a multiway pot? How about when its HU?

[ajmargarine]

....in a multiway pot? -- Fast and furious baby. Lead pot or overbet flop, same on turn, reevaluate for extraction on river if no four-flush hits.

How about when its HU? -- See above.