One can simply walk-in at many clinics and take appointments at the reception. This simply increases the risk of infections. We tried many ready made systems that could help. This could be used by doctors and barber shops. Here is a demo setup:
You can find link to the open source software and ask your IT partner to help. As usual, we will be glad to serve you if needed.
Also, watch this video below to understand how to use the easy appointments software to create and use a service: