Cityfile: New York's Most Notable and Influential

• Meet the heavyweight political donors who live at River House.
• Have you looked inside Natalie Portman's apartment?
• Henry Kravis gave $5 million to charity last year. And he's still smiling despite the economy.
  
• Have you called George Whipple, Tom Colicchio, Jon Tisch, Cynthia Nixon, and Nathan Lane recently? We did.
  
• Jason Pomeranc's hotel has been delayed many times. But he's had other things on his mind.
• Have you heard about the Manhattan doctor who spent $10,000 on his dog's bark mitzvah?
• Meet Devorah Rose, New York's most relentless social climber.
  
• Nancy Jarecki's rather unusual new ad campaign.

Meet Dr. David Best. He's the Manhattan physician who got booted on last night's episode of the CBS reality competition Greatest American Dog. Best and his little terrier, Elvis, it seems, do everything together. And there's nothing it seems Best won't do for his best friend: The doc spent $10,000 last November on the canine's "Bark Mitzvah" at the Tribeca Grand (left), which attracted Dr. Ruth and Elvis's mother, and also earned him the attention of CBS execs, who promptly signed him up for the dog-centric reality show. So it probably shouldn't come as a surprise that when the judges gave the duo the boot on last night's episode, Dr. Best didn't take it very well. Tears were shed. Dreams were shattered. (You can watch the epic meltdown right here.) More