The Downstairs Room, by Kate Wilhelm. Her 2nd collection of stories. Contents:

(Introduction by Kate Wilhelm)
Unbirthday Party
Baby, You Were Great
When the Moon Was Red
Sirloin and White Wine
Perchance to Dream
How Many Miles to Babylon?
The Downstairs Room
Countdown
The Plausible Improbable
The Feel of Desperation
A Time To Keep
The Most Beautiful Woman in the World
The Planners
Windsong

About half are original, the others are from Orbit 2, ORBIT 3, ORBIT 4, Amazing, Magazine of F&SF and Alfred Hitchcock's. Wilhelm won a Nebula for "The Planners" in 1968, and I'll put in a strong recommendation for "Baby, You Were Great."