You can also book the conference rooms for special events or private meetings. (thetidecebu.com)
One of the hardest parts of booking a conference is finding people who are able to speak freely about the biggest and most controversial topics. (publisherslaunch.com)
As far as ebooks go especially for the self - pub ones you can also attend book conferences and promote yourself there too though it is a little difficult when your work is digital. (selfpublishingrelief.com)