When throwing an event or exhibition, leave a guestbook somewhere obvious where people can sign up for your mailing list and leave comments or suggestions. There will likely be people at your exhibition or event who have not encountered your work or organisation before, so this is a good opportunity to capture their details and perhaps follow it up with a thank you.
We specialise in helping our clients achieve their goals. If you need help delivering this marketing idea, or if you want to take your strategy further, we at Wired Canvas can help. Have a look at our portfolio to see how we've helped others in the past and get in touch. We look forward to hearing from you!