A Korean company called Robot3 builds robots designed for purely for fun including for entertainment at parties and other events.
The most geektastic one in the bunch is a $5,250.00 four-legged beast called R7, which has a plush seat you can sit in while it walks around under your control. W00t.
The company also makes robotic animals, including ridable horses, a raptor, and a bartender which would be very cool to own. Robot Bartender, bring me a pint of Guinness please. They even appear to sell a robot woman! What more do you need in life? Get yours now
Update (9:44 pm): Apparently the site links for the robots are not working now due to a 503 service error which means the web server is currently unable to handle the HTTP request due to a temporary overloading. I guess to many people want Bartender robots.