52 yo and shoot for 7 days a week. There are enough interruptions due to kids, work, etc that it usually ends up being closer to 4-5. If I get a good 7-10 days a row in, I will voluntarily take a day off.
As far as programs go, I go totally intuitive. I am not competing for anything, so no real reason to get all anal-retentive. Tend to do large muscle, multi-joint exercises (Bench, squat, DL, press, bent rows, power cleans) more than isolation type stuff. Usually go as heavy as I can handle in the low rep ranges, but occasionally will mix it up with some high rep, BB-type stuff. Throw in some kettebell stuff once in a while just for kicks.
Been working on my snatch and usually try to hit it every time I am in the gym to try and help 'grease the groove'. Do progressively heavier reps until form starts to go and then I stop and move on the remainder of workout.
In the interest of full disclosure, I must admit that I am using some 'supplementation' that drastically increases my recovery capacity, and pre-supplementation, I was pretty much confined to 3-4X/week of fairly modest weights/reps.
Not surprisingly, the biggest obstacle I have is trying to work around my thoroughly trashed joints, which seem to migrate from here to there and back again.
Not saying its the best way, or even a good way, but that;'s how I do it right now.