Wanderers On Union Station — E.M. Foner

Start the series with the first book - Date Night on Union Station. Three years have passed, and the children are growing like weeds as Aisha grows into a new career. A mob of alien party animals has settled near Union Station like a plague, but nobody seems willing to see them off. They bring word of a new wave of helpful artificial intelligence, but perhaps there's such a thing as too helpful?