I did a little e-mailing and received this reply:
Thank you for contacting Marriott. We appreciate the opportunity to provide you with information.
The Curacao Marriott Beach Resort and Emerald Casino hotel does not currently have a publicly listed email address for the concierge, however, we were able to locate the hotel's email address.
You may also contact the hotel directly, either by phone or fax. For your convenience, we have listed the hotel's contact information below:
Curacao Marriott Beach Resort and Emerald¬ģ Casino
Piscadera Bay, P.O. Box 6003
Willemstad, Netherlands Antilles
Phone: 599 9 7368800
Fax: 599 9 4627502
Sales: 599 9 4337753
Toll-free: 1 800 223 6388