[LB_001]

Hand 1 I think you played fine, fold the river. Tough to put him on anything but a king, a flush draw or maybe 34 unless your description as "loose" means really loose. I think C/Ring the turn is very bad since there's a good chance he checks a king behind on the turn and frequently bets a made flush. I think you have to fold the river, it seems too unlikely he'd call with nothing on the flop or turn a king with no heart into a bluff by the river. Only hands I could see doing this is A3, 34.

Hand 2 I think betting the flop is probably best, it might look like a steal, and someone might be slowplaying a 7 which could turn into an easy stacking on the flop but might lose action from if a spade or straight card comes. Usually someone with a spade draw is going to call anyway and going to find it that much harder to fold if they do chase and hit. On the turn you absolutely need to raise imo, even if button is showing an interest in calling, you need to build a bigger pot. I'd put in 1200 or so.