If you fit a wall-bed in your room...

You may fit a wall-bed in the bedroom so that you can do some weight-lifting in the space freed up by the folding up of the bed.

But then let's say, the time taken for weight-lifting is just 30 minutes twice a week. Add 15 minutes for some preps to get ready for weight-lifting. So 45 minutes twice a week. That's it. The rest of the time, the bed can stay open.

For the sake of those 90 minutes, of course, you have to keep all the weights and barbell and bench (assuming the least amount of equipment) somewhere. Likely in the same room where you have the wall-bed and where you are going to do the weight-lifting. Is that too much?

When the equipment is lying in a dormant state and when the wall-bed stays open, is there enough room for movement around in the room?

Now, another point.

If you fit a wall-bed in your room, you may not find it a pleasurable experience if you do not quite know what you would do with/in the empty space when the bed folds up.

Typically when you don't know what to do, you end up sitting. And where would you sit if not on the bed. So the bed needs to be open when you don't know what to do with/in the empty space.

Yes, let me repeat it for my own sake. You would want to sit on the bed when you don't know what to do with/in the empty space when the bed is in a folded-up state.

That's a big problem.