The Call Button app is the easiest way to connect customers with a service if a visual connection is not guaranteed.
The app will show you the businesses which are using The Call Button near your location.
Notify a waiter/delivery golf cart/taxi driver etc. about your order and your location - with a click of a button. Your server/waiter will get a message about your order as long as they enabled "receive notifications" for their business.
The app is free for everyone and you can request new businesses to be added.
Visit www.the-call-button.com to learn more.