WHYPAY? conference rooms don't expire, so you can dial in using the details provided as often as you like.
Your conference room is always ready and waiting for you and your participants to join. You don't need to schedule conferences through your WHYPAY? account - you can simply share the dial-in details with your colleagues, letting them know the appropriate time and date to dial-in.
If you do schedule your call using your WHYPAY? account, you have the advantage of being able to set up recurring conferences, automated reminders for your participants and meeting notes attached to your conference invitations.