"Getting house" is a colloquial term referring to a type of applause that occurs during a musical performance, especially an exhibition of jazz
music. The musicians work to build incredible intensity, or other various, clever emotional connections to their audience, and when overcome by feelings of joy and appreciation, members may immediately and briefly clap, whistle or shout, to show their feelings of appreciation to the musician or musicians performing on stage. This type of display is inappropriate in various other settings, such as performances of traditional classical music
"The sax player is playing a swingin' solo, and I'm glad he's really getting house!"