What do you want to be when you grow up? And I'm not being sarcastic -- I'm in my 40s and people still ask me that!
You need to stick with the job that will get you to the job you really want to be doing.
You mentioned screenwriting -- if that's your goal, then Disney is going to give you a better opportunity to move in that direction. Not because they make movies, but because the theme parks have more live, scripted entertainment. At Disney, you can start out as the "pool boy" (for lack of a better term ...) and work your way into other areas. Less of a likelihood with Hard Rock.
Here's an example .... you're handing out towels at WL for an hourly rate. During the busiest times of year -- Christmas, Easter, etc -- you grab some extra hours on the "Extra Hour Hotline". One of those assignments is working parade crowd control. So, you do that a couple of times and you meet some of the people who work on the parades. Maybe you audition to be a Character or a parade performer, if for no other reason than to meet a few more folks in Entertainment. Every time there's a big special event, you grab some extra hours, and now you're meeting more Entertainment CMs. A year or so in, maybe you go for a professional internship in Entertainment, or maybe you ask someone you've met along the way who they know in one of the Creative or Show Production areas who might let you shadow them for a day, or even just meet with you for a half-hour to talk about what it is you want to do. When you meet with them, you ask if there's any way you could maybe meet one of the Disney Show Directors, because they're the guys who actually write the live shows and you'd love to find out how they got THEIR jobs. Someone encourages you to submit a resume and a writing sample for the Show Director Bench, so that when they need scripts for special events or conventions, you could be considered. And you move up throughout the Entertainment or Convention ranks, meeting people and writing show treatments along the way. Ten or fifteen years from now, you're writing convention shows or scripting stage shows ... all of which started with a job handing out towels at WL.
It's not easy, but that kind of job growth is possible at Disney, if you spend the time and energy working at it.
I don't know that you can take a similar route working at Hard Rock. IMO, by sheer size and diversity of product, Disney will provide you with more opportunities than Hard Rock will. But it will be up to you to make the most of those opportunities. It's still all on you.
I like this reply!
I have a sister-in-law that has worked at Disney and hated it, but her dad was an engineer there for years and loved it. You have to go into it knowing it is not going to be a fairy-tale dream job, but it CAN open doors for you, and it looks really good on a resume. And if the hours are good and you can go to school while working there, EVEN BETTER!!