The meeting spot for Laurel and the Hood, the Winick building, is named after writer Judd Winick who wrote issues of Green Arrow from 2003-2009.
Malcolm's office door reads "Faquet-Lemaitre Consulting" - a reference to Dominique Fauquet-Lemaitre set decorator on Arrow.
Vance calls The Hood "Merida" which is a Disney princess character who is skilled with a bow and arrow.
Wolfman and Perez Lawfirm is a direct reference to Marv Wolfman and George Perez, who worked on the creation of Slade Wilson (known as Deathstroke) in New Teen Titans #2.
Oliver Queen tells Tommy Merlin he is going over resumes for the chef at his nightclub. He says that 'this guy looks pretty good. He won Top Chef season 6." That would be Michael Voltaggio.