I do them whenever they fit into my schedule, weekends or otherwise.
As Lisa said, if I know it's a busy station I will try to go during non-peak times.
I've been known to show up at 24 hour stations in the middle of the night
when no one is around.
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There are no stupid questions, but there are a lot of inquisitive idiots
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When you try to please everybody, you end up pleasing nobody