An hour after that, we also secured an opening act who was performing at another private event in town to complete the lineup. We reassured the client that our team had it under control, and proved it daily. Related:11 Event Profs Share Their Biggest Horror Stories—and What They Learned Along the WayThe result? The assistant I worked with at an experiential agency gave me and my team the wrong venue. I called my contact, and we were able to get the message passed on to the rest of the event team, [including] the brand ambassadors serving the liquor samples.