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Wow, i think Heartsong and Dohzman and some others make some very good answers to you on this topic. Even if you do go into a bar for this purpose you had sure better be prayed up and have an excellant overall prayerlife. I too had thought of doing this a few times but after reading what Heartsong said I tend to think his advice is wise. So, when in doubt, Don't.
Heard a song or poem the other day about bars...
Bars
They bar the way to Heaven
And open the door to Hell