This CSS file is used in conjunction with ../js/bootstrap-datatables.js to tweak the DataTables plugin to work with the Bootstrap table styles and layout

This is your minimum initialization code:
	$(document).ready(function () {
            $('#example').dataTable({
                "sDom": "<'row'<'span6'l><'span6'f>r>t<'row'<'span6'i><'span6'p>>",
                "sPaginationType": "bootstrap",
                "oLanguage": {
                    "sLengthMenu": "_MENU_ records per page"
                }
            });
        });

See the following article:

http://datatables.net/blog/Twitter_Bootstrap_2