A lot depends on your location. For example, it’s much easier to run cables through walls/floors in some locations that others. There are a lot of repurposed century old brick businesses in my area, and those can be a headache for example. On the other hand, a new construction may already have cables in the walls for you to use.
The main things I would consider:
Ease of installation: Wireless is usually going to easily win that one, but not always.
Cost: Again, usually a wireless win, but not necessarily dramatically so if you are talking a physically small office space.
Dependability: Wired wins this one. Once all of the connections are double-checked you are unlikely to have problems. On the other hand, if everyone is on a laptop with a wireless connection, you WILL be resolving problems for them, it’s just a question of how often.
Security: Wired is going to win this one as well, although a wireless network protected with WPA2 enterprise is going to arguably be close.
Performance: Wired is going to win this one as well, as anyone who has a wireless network at home and shares it with multiple family members will tell you.
Weight what’s important to you, keeping in mind the physical characteristics of the location.