[sharpie]

I think the guy in the side pot prevents you from getting bluffed out, although button might ocasionally bet if he has something like a flush draw or a pocket pair.

A bet is not worth folding out overcards, you're betting 15 to win 30 but they only have about a 13% chance of drawing out, plus even if you do fold them out you might sometimes be beaten, or get drawn out by the guy all in. I doubt a draw is folding. The only value I can see in betting is not getting accidentally bluffed out by a worse made hand, but I don't think it's worth it. I would check the flop.