What make and model of switch?
If the computers and laptops are not going to be used at the same time then you should be fine.
This is not the ideal setup because you loose control of the number of devices on your network but if this is the only option then you should be fine.
The only concern is when you start loading up lower end switches with a lot of connections they start to drop packets and traffic gets congested. An example would be a basic 24 port dell or linksys would start causing these issues were as a good cisco or HP would be fine.