Saturday at the Rock and Roll Hotel. Dr. Dog with The Teeth and Hoots and Hellmouth. $12. Doors at 8:30, Music at 9:30. Depending on the circles you run in, Dr. Dog are either busy working a tired formula of lo-fi and late-period Beatles nostalgia or are one of a host of Philly groups artfully resurrecting the heady psych-pop era of the late 60s and early 70s. Both camps need to do themselves a favor…