House, or home concerts are one of the most interesting trends in live music today. Music fans contact artists directly to schedule up-close-and-personal performances, usually in the fan's living room or basement. A host (you) doesn't make any profit from the event, but suggests a $10-20 donation be made by each guest who attends.
These concerts in the home can have audiences of 20-60 people, often snuggled in with cushions, extra chairs, and a few extra barstools borrowed from the neighbors. A cozy, fun, and unique way to get your friends together.
I discovered house concerts a few years ago and absolutely love the atmosphere - you get to meet the audience, hang out, and usually create an one-of-a-kind event that everyone remembers for a long time.