The DJ who's not a DeeJay

To secure me, you need no key 

Push to enter, pull to leave
Door still opens whether you press or heave.
Crawl, walk or run will allow to enter and never fall
But running into a sliding door is like charging a brick wall.

I saw this sign in a restroom door in the Super Bowl restaurant, Glorietta, Makati.

It seems like it's telling you that you won't be able to open this door on your first try if you don't put any effort into it.

OR

You need to eat a lot in their restaurant to have energy to push the restroom door.