Man is most nearly himself when he achieves...
We don’t stop playing because we grow old; we grow old because we stop playing.
Or the Adv. Search tab at the top of the screen.
I don't see any option for recommended numbers of players in the Advanced Search, only the option for range of players allowed.
This information would be useful to me, too. Arkham Horror allows eight players. Hoo boy, is it not recommended.