Get ready to assume the party submission position, because here is a TurtleBot that is equipped with a 6 Unit Beverage Delivery Interface and is ready to initiate party mode.
While more work and testing needs to be done, the upward facing center mounted sonar sensor should provide a means of reliably signaling to the robot that a beverage is needed by waving a hand over the robot. This should help prevent unnecessary collisions between robots and humans who have reached their beverage capacity.
The Beverage Delivery Interface will likely undergo productification after further development and debugging during holiday testing season. Impatient TurtleBot owners interesting in beta testing should send an email.