People that visit Vegas often end up getting tattoos and they often wind up getting one at a low quality, dingy parlor in some alleyway off the Strip.
Go out of your way to come here. It's brightly lit, clean, unique decor, and the staff is friendly and accommodating. 99% of the time they will take walk-ins.
The guy that did my tattoo no longer works there, but everyone there is talented and will hook you up with some amazing artwork.