Here's a neat way I did it:
table tr {
border-bottom: 4px solid;
}
That will add 4px
of vertical spacing between each row. And if you wanted to not get that border on the last child:
table tr:last-child {
border-bottom: 0;
}
Reminder that CSS3 pseudo-selectors will only work in IE 8 and below with selectivizr.