I ask you to check with Social media
Ever since Myspace, musicians have gone crazy for social media. Every band has a member whoÃ¢ï¿½ï¿½s on Twitter half the day, so if you spend half the day on Twitter too, you just might run into each other.
Don't be too upfront. Again, it's a great way of meeting musicians and building a relationship so they think of you first when they're ready to record their demo/have it mixed/whatever you're planning to do with your studio.
Start by following all the musicians you can think of in the local area. Check out their music, say nice things about it. You know, make friends.
However you want to approach it, getting clients is about identifying your target market (musicians with cash to burn), letting them know you're there, and making an attractive offer.