On Quisco, organizers publish their own pub quizzes and trivia nights, so they all end up in one list. Every quiz here says where it is, which night it starts, what the questions cover, what it costs and how many places are left — so you find this week's quiz without digging through social-media posts.
You sign up here too. Pick a quiz, register your team, and your place is reserved. When a quiz is full you can join the waiting list and take a spot if one frees up. Once the quiz is over, the organizer can publish the standings on the same page.
If you run a quiz, Quisco takes care of everything: publishing the event, collecting registrations and waiting lists, keeping track of who is coming, and publishing the results afterwards.