OlBlueEyes said: "Can I get a weak vote for what the theaters and concert halls now call "Galas?" They grab all the star-power they can and shuffle them on and off the stage, singing one number. Like the recent New York Pops Gala or the Carnegie Hall gala that featured, among many others, Renee Fleming, Emanuel Ax and James Taylor. The galas usually honor some person or organization, although we all know that it's their biggest night to pull in cash, and there's usually some theme.
I try to distinguish a gala from a concert by multiple artists singing just a song or two, in place of a few singing enough songs and interacting with the audience enough so that we get to know them.
This 2014 City Center Gala, celebrating Rodgers and Hart and Hammerstein, is one I would surely like to revisit after looking at the song list. Overture from Oklahoma, "It Might as Well Be Spring," Laura Osnes, "My Heart Stood Still," Kate Baldwin, "This Can't Be Love," Cyrille Aimee, "The Gentleman is a Dope," Heidi Blickenstaff, "Pas De Deux" from the Carousel ballet, "Soliloquy," Brian Stokes Mitchell, "This Nearly Was Mine," Paulo Szot, Kelli O'Hara singing "Hello, Young Lovers" for what she said was only the second time in public.
And about six more songs. I often enjoy this type of performance more than many Broadway shows.
What you described is not a revue. It is almost always a one performance event with super high prices benefitting some good cause. It doesn't have to worry about filling a theatre week after week, and selling enough tickets to meet its weekly nut and hopefully return its investment and catch on for endless runs in the hinterlands.