QUOTE:
How do you remove the accessories and seats key at the bottom of the seating chart?

On the Admin backend, go to "Components" -> "myLANsite Seatmap" -> "Element Categories". You can change the "Show" flag there. Only the ones with a green Tick will be shown in the Frontend.

QUOTE:
Also the side bar of my template interferes with the seating chart. Any possibility of tweaking the theme for only this page? All I want on the seating chart is the site header and the seating chart. NOT the right hand menu.

Joomla has the lovely ability for you to configure which module is shown on which page. By default, most modules are active on all pages. But if you configure all the modules in your right-hand menu NOT to show for the seatmap page, if your template is properly written, the right-hand menu should not show up at all.