Multiple Blogs on Different SubDomains of my Server Installation

I’m working with a client and using WordPress as a CMS. We are creating a domain for them and I have no issues installing wordpress in the root directory so its comes up when you type in our url.

My question is this, they would like to have several sub-blogs for the client’s president / high executives etc – and they’d like to have them listed as sub-domains of the site.

So something along the lines of:

Full Site = https://www.example.com
CEO’s Blog = https://joebob.example.com
Exec Blog = https://jonny.example.com

How would I go about installing wordpress to allow this? Would they need to be in different DB’s? I’ve heard (and used) wordpress MU but I’m not a big fan of it.

Thanks in advance for any advice.