Club Penguin’s Fair is over, but you can still access the three Fair rooms (Bonus Game Room, outside Circus, and in the Puffle Circus) with a small cheat!
For the bonus game room, log in with the following link: http://play.clubpenguin.com/?rm=851#login/
For outside the Puffle Circus
(you can then enter it, but note you can’t get prizes) according to the comments you can. use this link: http://play.clubpenguin.com/?rm=852#login/
And finally, to log in directly to the inside of the Puffle Circus, use this link: http://play.clubpenguin.com/?rm=853#login/