Harp music is a perfect backdrop to many different events. It gives a very warm and cheerful feeling to the room, and it is never overpowering. If it is a fairly loud event or a big room, it's sometimes a good idea to amplify the harp so it can be heard. Many locations have a sound system that can be used, but if not, I have an amplifier I can bring along to boost the sound a bit.
My rate for background music is $175 for the first hour and $100 for a subsequent hour.