The stated age for all the parties is 21. In practice, if someone is under 21, other than at Gypsy (and dunno about the b-unit party) most likely no one will raise a big stink -- there usually isn't ID checking - although none of the sponsors to a party will publically admit to that

Now of course if someone under 21 gets in, gets trashed, and makes a scene, it *will* cause a problem and could potentially have negative effects for everyone -- forcing the party sponsors to actually be strict about ID -- so hopefully anyone under age will be responsible about things.