I am trying to practise in becoming more assertive and it has helped a lot so fair.

I was at the gym today and some guy got pretty much right in my face, when I was in the spot firs t (there were plenty of free spots). His legs were pretty much in my face and I asked him to move over, he just looked at me and said no and kept working out, so I didn't move and just continued my workout.

What would you do in cases like these?