Another idea...Do a real cake. Put yourself into it, three-tiered, beautiful work...different flavors and fillings for each tier, go with what the young bride's seem to want now, fondant look, minimalistic decorating style or gift-present style, you know, go all out but in a look that is popular.
Then, bring it to the local hospital, the business office or one of the nurses break rooms. Here you have a group of young nurses, young ward clerks, and also a group of MOB's, sisters of brides, friends of brides. The cake will get dispersed throughout the hospital, the employees will rant and rave, they'll appreciate the cake, and they'll probably post your cards in all the break rooms, or let you do it. It will really help if you know someone that works at the hospital, and tell them in advance what you want to do, they'll tell you when a good time to do this would be, tell them you are entering a contest or a wedding show or whatever and wanted to make a practice cake but didn't want it to go to waste.
This is an excellent place to reach people! My friend, who posts on here, LJBerry, works in a hospital, and you wouldn't believe how many orders she gets from just bringing cakes up to the hospital. These people EAT and TALK, word of mouth! (We brought a wedding cake there one time right after a wedding show, this is where the idea came from!)