Rex

From Memory Alpha, the free Star Trek reference

Rex in his bar
Species:	Hologram
Appearance:	Human Male
Holoprogram:	The Big Good-Bye
Creator:	Tracy Tormé, Broht & Forrester
Original purpose:	Holonovel
Occupation:	Bartender
Played by:	Rod Arrants

Rex is a character in the Dixon Hill holographic novel The Big Good-Bye. He was handsome and a charmer. He owned a 1940s bar named Rex's Bar. He amusingly replied to Dixon Hill when asked for his last name, "Hmm, don't think I have one. Just Rex, that's all."

In 2365, Ambassador Lwaxana Troi of Betazed, visited the USS Enterprise-D. Captain Jean-Luc Picard in order to escape Mrs. Troi's amorous advances, decided to seek refuge from her in Rex's Bar.

Lwaxana followed him into the holodeck and lost interest in Picard after meeting Rex. To her regret, she later found out that her dream man was only an illusion. (TNG: "Manhunt")