ok, fine. I will play devils advocate for the Christian bar.
1) the only sin is to be drunk. yet you say one drink is bad or two.
2) therefore, giving that one or two beers or how many that doesn't lead to the stupor isn't a sin and given many Christians go to sports events, restaurants, and drink a few without getting drunk its ok to have a Christian bar.
what makes that wrong? I will tell you. beer tends to make one addicted to it. the definition of addiction need not and doesn't mean one gets drunk all the time just that one cant function without it. does that apply to tats? yes indirectly. tats while yes could argue that one can as many do not sin with it. but and its way more likely since well the world artistic nature of movies and so forth means that other things then Christ will be placed on the body. this would lead to going to non Christian parlors where imagery seen may not be so appropriate. ie a local tattoo parlor and note the not so Christian imagery of Halloween things. while im not for Halloween nor against it. I prefer not to bother with it but to appease my family I go along. that is another thing but there is images there that may of idols. im sorry isn't idolatry a sin? yes.
https://www.facebook.com/pages/InkSlangers/125037697606115
that parlor is one of three that I know are on the city grid. I see that place once a month. I have seen some of the work as they wear it walking out of the place when I pass by walking.