Here are some suggestions on how to find a band or dj:

1. Using the web
2. Referral by caterers, friends or family
3. Having seen them at a party
4. Bridal magazines and publications
5. Call and speak to musicians or dj's (people who actually perform, not secretarial staff)

Here are some methods to actually see or hear the music:

1. See videos, hear audios
2. Meet the band leader of dj at their office
3. See a live performance if possible