While you could add a WAP (Wireless Access Point) and configure it to do that, you instantly broke some key security rules for most if not all businesses. You could be setting them up for yet any "Company ____ announced today that customer records have been leaked."
Your choice so go right ahead.
Looking for some help. I'm helping out a business that currently has a small LAN in place but would like to have a wireless network in place for people who hold meetings or conferences at their site. Ideally this wireless network would be open (so people can easily connect without having to enter WEP or WPA security information) but also separate from their wired network so there is no worry of anyone getting somewhere they shouldn't be. Is this something that is easily done with retail wireless networking gear ie: linksys wireless router or access point? Any help would be appreciated.