To brides looking for updated information:
Hall rental cost $500 (check payable to city hall). Most reserve the hall all day to allow plenty of time for set-up. No deposit is require, just pay $500 the week of the wedding. Kejuan will send you a contract to hold the date. You'll also need a insurance policy which roughly cost $100. Provide this to city hall the week of. Chair rental runs about $500/ to seat 100 people... All depends on what you rent and who you rent from.
The artwork is non-negotiable and must stay up. Kejuan does allow you to cover them up with fabric if you wanted to. City hall does get very warm. It does not have A/C. You'll be responsible for the Audio system/speakers but outlets are available. A security attendant will be onsite directing guest and preventing non-guest from entering.
And as you read in other post, Kejuan is difficult to get a hold of but be persistent.He could just be a very busy guy. Schedule a weekday time to meet with him in person and go over wedding details. Good luck!