Do you foam roll?

No. I found it doesn't help much. I stretch my problem areas like hamstrings and achilles.

I look at it more as a stretching-like thing, with feel-good and maybe some small recovery benefits, but that doesn't necessarily make it not exercise? I don't log it as a separate exercise if I do just a bit of it, but if I do a long stretching session that I want to log, I'd include the foam rolling time in the total time if I did some in the session. There's a "stretching" entry in the MFP cardio exercise database, with a quite low calorie estimate per minute that covers that kind of thing OK, IMO.

If you try it and find it pleasant or helpful, it really doesn't matter if you call it an exercise or something else (stretching or whatever), does it? Technically, you can log pretty much any movement in MFP as exercise, but people who claim exercise calories for every movement throughout the day can end up double counting calories that are already in their base activity level (like routine house chores).

Whether to log foam rolling as exercise is really a question of whether it's numerically meaningful to you for the calories, or worth logging to record the fact that you did that exercise-related activity.

I've done it, but I find it awkward. I can't put all my weight on my quads, so I'm sort of draped over the thing.

My alternative has been "ball against the wall" rolling. It works incredibly well for my problem areas which are hips, IT, and lower/upper back.

I always use the foam roller before I do any kind of workout as part of my movement prep. Sometimes it feels great, other times it’s hateful! Haha!