[rivhawk02]

This seems like a pretty bad spot to semi-bluff the flush draw. There are two opponents in the hand. The button could have easily bet a flush draw because they are in position. The other scenario is that cutoff could have called with the flush draw and already hit it on the turn.
One of these scenarios is very highly likely because 5 people saw the flop.
So, the fold equity you have with the hand (the real value of the hand) is small in this multiway pot. I am checking the turn and at most calling a $1 bet to hit my flush.
If only 2 people saw the flop I wouldnt mind firing the turn for 2/3 to 3/4 the pot to represent the flush, but multiway I play it slowly for reasons stated above.