Well, that was a surprise.
7 clubs is the usual “top of Mount Everest” for club numbers juggling. By now quite a few people can do it, and the very best can do it for minutes. A handful of jugglers have dabbled with 8, and have claimed to at least have flashed it. Anthony Gatto has qualified 8; you can see it in this video:
Part of the craziness here is releasing and collecting 5 clubs from one hand. Quite humbling when my collect of 5 clubs is still so bad with 2 hands.