score:5
According to the airport web site, since your connection is longer than 6 hours, they won't even let you hang out airside anyway.
If your transit time exceeds six (6) hours, you will be required to exit Immigration and Customs and enter Fiji
Might as well make a virtue of necessity. That website includes timetables for three bus lines that run to towns and resorts. Some of them seem to be as much as 2 hours from the airport, but there are stops closer as well. The town of Nadi is only 9 km from the airport, though it has no beaches.