What's a healthy number of hobbies to have?

Too many hobbies and you're too busy and never have time to relax, too few and you are boring. What's the magical Goldilocks number or number range for hobbies one should have? For the purposes of our lives, does going to strip clubs and posting on internet forums count as "two hobbies" or does a hobby not really count if you can't discuss with other people what you do?

I suppose then that three hobbies you can discuss with other people is a good number? What about hobbies you've had in the past that you can sort of briefly get into if you meet someone who's into it even though you don't necessarily make it a part of your daily life?