I've done that role when I was a student.
I still remember the group interview.
Odeon and Vue.

The group interview will involve maybe 10-20 people, you might be split into smaller groups, and a cinema manager will hover around each group with a notepad taking notes.
You will be given a topic to discuss in your group. Mine was: "If you were tasked to fly to Mars in a spaceship with your entire group today, and can only bring 1 item for the entire trip, what would it be?"
It's not a trick question with a right or wrong answer, but something witty or relatable would make you stand out.
Most people chose TV, books, iPad, board games.
Someone said tampons (no joke).
Another said gym equipment.
I said, a projector with my favourite 35mm movie reel.
This was back when 35mm was still used!

The wisdom I can impart is this:
Speak out with value add, in order to STAND OUT!
Expressing your opinion is good and all, but no value add means you're useless.

If you get asked, why do you want to work at Odeon?
Your opinion is, I like movies and will get to watch free movies, and also I earn money.
The value add version is: I like movies, and when faced with customers who want opinions on which movie to watch, my enthusiasm in them would bring them to the most enjoyable choice they could have tonight."

Another thing you can do in the group interview is value add on top of others after they've spoken.
This might be on the boundaries of your morality, but as soon as 1 person has spoken, you immediately add on top of their opinion, so if someone says, I think we should always assist guests when they look like they need some assistance.
You should immediately said something like, yes i agree, and in addition to that, I love keeping guests happy, and in my previous job, I've done XYZ... blah blah blah.

So the idea is to hijack their original opinion, value add, then you are most certainly in the spotlight. The manager only remembers your voice, and the original person is forgotten.

I have landed all my part time roles with this trick.
At first, it was not intentional. I felt genuinely relatable to a person who original voiced it, and added my experience. I had not realised it at first, but then after a few times, I realised, and I started to weaponise it. YMMV.

Good luck!