Access to ubuntu guest from a LAN

I know this has been answered before, but I can't make it working nor with NAT mode nor with bridged.

I've an ubuntu 12.04 as guest with bridget mode with ip 192.168.0.12 and I want to access this vm from my LAN doing in browser from any mac on the same Wifi:

http://ubuntu-vm:8069 (openerp test server there)

I'm accessing without problems from the mac, because I've added the 192.168.0.12 to /private/hosts file, but only with ip (192.168.0.12) from the lan. How can I access from lan in the browser the same way as http://ubuntu-vm:8069?

Thanks and regards.