If not a university, they can try to have their event at some famous scientific institution, like the Smithsonian. It's a win-win for creationists: if they succeed, they get respectability the famous name gives them; if they don't they can cry "censorship" and make a movie about how poorly they are treated. It feeds the martyrdom scenario that many fundamentalists seem to enjoy.
The latest bogus creationist event is the "Origin Summit", which they managed to hornswoggle Michigan State University into holding. According to Science magazine, subterfuge was used from the very start: "Creation Summit secured a room at the university’s business school through a student religious group, but the student group did not learn about the details of the program—or the sometimes provocative talk titles -- until later, says MSU zoologist Fred Dyer."
Dishonesty and illegitimately seeking academic validation: two of the major characteristics of creationism.
(By the way, if you want to be really appalled, read about Jerry Bergman, one of their illustrious speakers.)
P. S. If you look at this page, you'll see evangelical whack job Lee Strobel described as a "certified agnostic". I wonder where you get certified. Maybe they meant "certifiable" instead?