It looks like your working on the site.
Your dorpdown code looks like this:
<p><span>917-650-9534</span>, email@example.com<br />
143 leonard street, apartment 5, brooklyn ny 11206</p>
You have a hover rule for contactrollover, menubuttons, and addressbox. Can't work with that.
Son of sucker fish is down or gone so I'm sending you here to see how a css horizontal menu with a drop down is made and styled. http://www.devinrolsen.com/pure-css-horizontal-menu/