As an audience member, if you have questions about an upcoming show, start by reading the description on the show page and/or the message in your ticket confirmation email.
A reminder email will be emailed to ticket holders 3 days before the show, often with some additional information about the event.
Double check the facebook event page (which you can find through Side Door’s event listings on facebook) and post your question or message the host/artist, if you feel comfortable doing so.
If you have a personal connection to the host and/or artist, reach out to them through your preferred means of correspondence.
If all else fails, contact firstname.lastname@example.org