Thanks ladies! He has settled right in here. Izzy loves having a tiny sibling to play with and learned pretty fast how to handicap herself so Tango would play with her. Even Jade will play with Tango. It's funny though because he keeps trying to jump to the places that Jade does and occasionally face plants because of it.
Tango has a fanbase at the dojo where I work. Every day that I work, he gets super excited when he hears my keys and waits at the door to be put in his harness and hop in the car. He trots right up to the door like he owns the place and makes rounds to all of the employees before he settles down. And of course the children love him, he's great with the kids, always giving them little kisses and wagging his tail. He still has a few parents he's not so sure about but we just keep having them give him treats in hopes he'll get over it. Any time he's sleeping in his crate, people always ask where he is since he's sort of the unofficial greeter of the dojo. The owner said his favorite part of the day is playing with Tango on the mat after all of the classes are done at the end of the day. This little dog has won many hearts