Getting an agent can be useful if you're already established and want to do certain types of shows, such as comedy clubs.
They are no good for corporate work, especially trade shows, in my experience.
If you are looking to work high end private party work, I suggest that you contact any and every event planner and party planner in the tri-state area and list with them all.
Just don't sign ANY agreement where they require you to be exclusive with them. That can cost you work in the future, big time.
Hope this helps!
Lee Darrow, C.Ht. http://www.leedarrow.com