Attending a live musical performance in a huge sports center with thousands of other supporters of the musician is exciting.Even in a smaller place, such as a restaurant or theater, a skilled performer can provide a great show.Here in the U.S., a very different kind of performance space is gaining in popularity.Singer-songwriter Annalise Emerick is getting ready to play a show in Nashville, Tennessee.It is something she does most nights in coffee houses, bars, auditoriums, and other small spaces across the country.But tonight, the setting is even smaller. Ms. Emerick will play for a few people in Kristina Shulz's home."An artist will come into my house and play music and I don't have to go anywhere.All I have to do is provide the atmosphere, which I am absolutely happy to do."Ms. Shulz has been holding such performances in her home for about four years.As many as 30 people have attended past shows. The crowd is usually a mix of family, friends and neighbors.But some strangers might show up, too. The performances are listed on house concert websites.