My guess is that most alleys would be reluctant to do this for an individual. Its mainly that it takes time to set the machine for a particular pattern, and then change back to the normal house shot. Your best bet for practice would be to bowl after a sport league. If you really get lucky, they might oil an extra pair in case a lane breaks down and you might get to bowl on the fresh pattern instead of what it evolves into after three or four games.
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