Answer: Chicago and New York
Each team had three players on the Eastern squad (to make up 6 of the 12 players representing the East): Chicago sent Scottie Pippen (who was MVP of the game), Horace Grant and B.J. Armstrong, while New York sent Patrick Ewing, Charles Oakley and John Starks. Add two New Jersey Nets to that (Derrick Coleman, Kenny Anderson), and that left only four spots for the other 11 teams to fill. It is usually unlikely a team will have two, let alone three all-stars on their roster in the same year, so this was a pretty memorable factoid.