I had a while where if I brought my bike in for repairs, magically something else would break within a week after picking it up from the LBS, but it was a 6 year old bike, with 25k+ miles and 6 winters on it, and I don't maintain it very well, so it was believable.

My shop is always willing to work with me on timing. They like several days, but generally if I tell them schedule me further out then, but make sure mine gets priority once it's in, it works out to only 2 days or so. Then again, I always bring them a 12 pack of beer as thanks for the larger repairs, seems to keep them happy with me.