I am stumped here....I have been asked to do an anniversary cake for a couple whos wedding was 1920's mob themed. I am having troubles coming up with ideas other than putting a fondant tommy gun on it. Please shoot me some ideas without having to mold too many fondant props onto it. Thanks in advanced.

How about a target cake.  http://www.cakecentral.com/g/i/1861062/10-butter-cream-cake-airbrushed-black-bullets-are-fondant-bullet-holes-were-done-by-sticking-a-dowel-rod-in-the-cake-to-make-the-hole-then-inserting-a-torn-piece-of-gray-fondant-painted-silver/

Awhat about bullet holes in the fondant and then one bullet could be piercing a bottle with a label on it with their names and the date --

or if you wanted something more far out-- the liquid could be depicted flowing out of the bottle forming a heart with their names &the date--

i'm just brainstorming -- might spark an idea for you

Ano no I got a better one...maybe -- but y'know how the speakeasies had a doorkeeper where the client had to have the 'secret' password? well maybe an old fashioned door with a little peephole -- larger than present day peepholes -- you've seen 'em in the movies-- kind of a slot where two eyes peep out at you -- of course the client wanting entrance says "joe & annie sent us, the password is 8/27/13"or whatever the date is --

just brainstorming:)

I would look to the fashion.  Think black and white pinstripes with red accents, flapper beads, a fedora, maybe even some feathers.  It doesn't have to be literal. Google 20's gangster themed cake.  A few cool ones come up.  I saw one that was mainly black and white with some red roses and cigars.  Pretty cool!

............speakeasies had a doorkeeper where the client had to have the 'secret' password?...............

What's behind the green door??   Remember the song?

AYes! The green door -- good one, Lynn! lol