Depends on how many people are there. You have to check in at the entrance to the Sportsbook section where security checks your VALID ID. Then you want in line to go to the counter inside the Sportsbook. If the line is short, you're out fast.
I'm not positive because I work on the horse racing side; however, I don't think it takes very long at all from listening to other people.
If everything is setup correctly and there are no issues with the information, it can be done as quick as a minute.
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