If you have published your event to ACTIVE.com, there is a section for visitors to leave comments. You can view and respond in this section after Logging into ACTIVEWorks Endurance 

1. From Organization Dashboard (HOME), under Your events, click one desired event name
​2. Click Setup
3. Within ACTIVE.com box/section, click Your event is listed on ACTIVE.com! to access your ACTIVE.com page
4. Scroll down to the section Discuss This Activity, where you will see and be able to respond to comments