I just got a response from Carnival
Thank you for contacting Carnival Cruise Lines. We appreciate the opportunity to be of assistance.
Considering that e-cigarettes are relatively new and still being evaluated, Carnival's policy is to allow e-cigarettes in the same venues and areas where smoking is allowed. Carnival's policy on e-cigarettes is consistent with other major cruise lines.
We are always looking for ways to improve our cruise line and suggestions from people like you are a big part of our decision-making. Thank you for taking the time to share your suggestions with us; we will forward them on to our upper management for consideration.
Thank you for making Carnival Cruise Lines a part of your vacation plans.
Cordially,
Vernisha Williams
Guest Solutions│Carnival Cruise Lines
groupsales@carnival.com │ 1-800-438-6744