This was another annoying thing I didn't know how to get rid of. Had to do some digging and found a solution which Microsoft provides. This fix requires Visual Studio and the creation of a console application.
Use this when you can't get rid of a particular meeting in a Meeting Workspace. For example, you have 3 meetings in a meeting workspace, each with their own dates. There is no simple way to delete one meeting unless using this method. Hopefully this will be rectified some time later. For now, check out the link above for the how-to.