AGMA (American Guild of Musical Artists) http://www.musicalartists.org
APAP (Association of Performing Arts Presenters) http://www.artspresenters.org
Arts & Business Council business volunteers for the arts http://www.artsusa.org/private_sector_affairs/arts_and_business_council/...
Arts on the Line http://www.artslynx.org/aotl
Arts USA http://www.artsusa.org
Dance/USA National service organization for not-for-profit, professional dance http://www.danceusa.org
Guidestar national non-profit database (USA) http://www.guidestar.org
Management Consultants for the Arts http://www.mcaonline.com
NYC Dance Places free database of available rehearsal and performance spaces for dancers, dance companies and choreographers http://www.nycdanceplaces.org/new-york