What is that artificial fog that shoots out at night clubs made of?
Its liquid nitrogen usually since that is a non toxic gas. there are small fog machines made by different companies for parties but in most clubs they use a kryogenifex system which is larger scale artificial fogger.
Many of the top manufacturers have their clubs made in countries like china etc, althought not all their clubs. I think some of the higher end of their ranges are still made in the USA. If you want to be sure your clubs are made in the USA then try a custom build company like Grandt Industries, Inc.