I'd think that if Holiday Inn had any security cameras, the first places the cameras would be located would be in the driveway & lobby areas. Also, security cameras can be quite small & unobtrusive...not readily apparent, which would be a factor in decor & also in creating a 'friendly' space--which would be important for a hotel lobby.
Here are pics of the HI and a virtual tour of the lobby. (Though, IMHO, she was never there that night.)
http://www.ichotelsgroup.com/h/d/hi/1/en/hpt/AUAAN/2/pt?ptLink=hd