Sorry I'm with Hank on this, there is no need to force the map onto the front. It's a two sided sheet of 'paper' it doesn't need the principles you'd apply to a website, we have long established natural behaviour when it comes to flyers.....Marketing!
I may be pants at design but I do understand marketing.
On the front put something like: "Weekly opening in X, Y and Z. See back for menu and locations". It acts as a call to action.
Assuming you just don't bin or refuse the flyer, when was the last time you got given a flyer and didn't just flip it over... hell I can remember flipping over single sided ones just to make sure there wasn't anything there, normally before chucking it in the bin ('m not a huge flyer fan) but still.