Change font in Submenu

I'm trying to change the font in my submenu. I'm using the hot_hostel theme, and there's no way to change the submenu font in the template editor, only the top menu. I've tried adding the following code into the template_css.css file:

#nav > ul > li > ul > li > a{
font-family: 'fontname'
}

I've tried this a couple other things, and I can't figure it out. I'm guessing I'm either typing the code incorrectly, or I'm just putting it in the wrong place. Or even both. (narrows is down...I know.....)

zacharysgrill.maburke.com/

Put this on bottom of template_css.css

.mnu_mainmenu li ul li a{
font-family: 'Times New Roman'!important;
}

Choose font-family you want. And be careful to choose defined fonts, if you want custom font you should enable it via @font-face (more about it www.font-face.com/ ).