Hello!
My idea was to convey the festivity and fun of a soccer field, with a ball with a birthday hat and colorful confetti. I also wanted to be direct with the parents, so that they would buy the party service, and I used a color palette related to the soccer field, with vibrant colors.
I placed a photo gallery, with a carousel, that allows them to enlarge the photos, so they can get to know the room.
I suggest an extra field to put a sales text, with some more information that may be relevant.