Abstract: Various embodiments are generally directed to an apparatus, method and other techniques to receive a message directed towards a common telephone number, the common telephone number to enable communications between attendee devices and organizer devices. Embodiments also include techniques to determine whether the message is received from an attendee device or an organizer device based on a telephone number associated with the message and the device that sent the message. Further, in response to determining that the message is received from an attendee device, send the message to one or more organizer devices, and in response to determining that the message is received from an organizer device, send the message to all attendee devices or a specific attendee device based on information in the message.