Hi Noel.
You’re quite correct – the setting you are referring to doesn’t impact on the venue template. So, for the time being at least, you would need to modify your theme’s copy of the single-venue.php (within your theme’s events folder … if this folder hasn’t been set up already please take a look at our themer’s guide and follow the steps described there).
Within your theme;s copy of single-venue.php you would be looking for the following lines of code:
Removing these lines should stop the map from displaying.
Hopefully that does the trick – but if you need any further help please just shout back 🙂