A brothel in Germany, taking a cue from Golden Palace online casino, has encouraged gentlemen clients to get their logo tattooed on their arm as free admission for life. The article doesn't explain exactly what comes 'free' - it sounds like the brothels have a certain strip-club atmosphere, in which free admission means you only get to skip the cover charge. Not exactly worth a tattoo, but if you can get some 'value-added' services from the women within, well, if you go to the brothel enough to think free admission saves you a boatload of money, you're probably not hiding the fact very well, and a tattoo won't be much worse. Photo of the tattoo here.