Looked at Apple, Partiful and Posh first. What they share is not a template: a neutral grotesque in mixed case at normal weight, no caps labels, big whitespace, pill buttons, and the content's own artwork doing the design work. Partiful is near-black with a soft colour glow and a phone-number box in the middle; Posh is white, tiny type, one poster-sized event image; Apple is stacked full-bleed tiles, a centered headline and one line under it, two pills. Each of these four takes one of those and gives it our coral and mark.
Posh's move: the event's own picture is the whole design, set large, with the name small under it in a plain grotesque. Our league has real photos. Everything else on the page gets out of the way. Section labels are tiny and grey, not caps.
Pick-up
Leagues
Tournaments
Partiful's move: near-black, a blurred glow of warm colour bleeding in from the top, thin rules, pill buttons, a plain grotesque. Ours glows coral and gold, not violet. Rows with a small photo, like a guest list. This is the one that says "the app for a night out" and it suits pick-up.
Apple's move: the page is a stack of full-width tiles, each with one centered headline, one line under it, and two pills. The photo tile is the product shot. It's the most "website" of the eight, and the easiest to grow: every new league is another tile.
Not a website at all: an iPhone screen, in the system's own grouped-list idiom. Big title, white inset groups, 17px text, chevrons, grey footers in sentence case. It looks like something installed, not something generated, because the idiom is Apple's and everyone has it in their pocket.