A dark haired man, who one could hazard a guess is Hazelton's ghoul from proximity to her at Elysium. The ghoul is within Elysium, lingering by the coat check.
Spotting a particular kindred, the ghoul approaches holding an envelope.
"Dr. Baker?" The ghoul inquires. " I am an employee of Priscus Hazelton. I have an invitation to you from her."
The envelope is offered out to Dr. Baker.