I would second this, you are going to have to go direct to niche sites that hold your target demographic and do deals directly with the site. Sites that revolve around social drinking and partying would be your prime advertisement venues, but the mainstream is not going to touch it and rightfully so. Even if it is not that offensive, it has the potential to turn off more individuals that view the advertisement, than the niche sales can replace. So it is a simple decision for them, they deal in the mainstream.
You may be able to target certain bars with a bulk deal, in which they purchase decks for patrons. As well, you may want to do demographic studies to find out which age, culture, gender are more apt to be consumers, then heavily target that market via campaigns directly to sites they hang out on.