You want to be reachable for someone, but don't want to hand out your private phone number / email address? Or do not know the phone numbers / email addresses of the people you want to communicate with (e.g. in a workshop)? Here is the solution: A unique, unguessable chat page ('chat room') which only you can access, and those people whom you invite.
Create a chat room and show its QR code to the persons with whom you want to chat.
This is totally anonymous; your phone number, your email adress, even your name are not needed at all.
No registration needed, no costs involved. Click here for more information.