A person who gives a workshop can be called a workshop facilitator, instructor, trainer, or presenter, depending on the context and the nature of the workshop.
A laboratory
The Host
Conference : Everybody attending conference knows about the topic going to discuss. Its about sharing knowledge. Workshop : The person who conducts the workshop knows well about the topic. Everybody else learn from the person who conducts the workshop.
No.
A pig.
The name you give to a person who cares is an empathetic or caring person.
A thief.
undertaker
Host or Hostess
give them your phone number
The Director
give him the call me sigh, that will get his attention.