The right music is essential to creating the atmosphere of any gathering, and a garden party is no exception. Spring equals lively, and there are great music choices in every genre. If you're hosting a classic party in a formal setting, you might want to compile a collection of light and airy classical selections. If it's an upscale, modern affair, consider a mix of upbeat ambient grooves a la art gallery opening. If barbecue and beer are the theme, dust off your classic rock. But if dancing is on the docket, pump up the volume with some tried and true dance tunes. You can never go wrong with disco.