Observation, May Not Mean Anything: Tours Starting in the Market

METALLICA, TOOL, IRON MAIDEN – all within three weeks locally and each starting the US leg of tour at the local show.   
Prolly just coincidental but I wonder if there is a new pattern.
Anyone notice more of this – large venue or club level?
I think the DC market is just considered a warmup location for the real shows in Baltimore.
Sounds like we can add Allison Moyet to your list.
The Wedding Present in April starts here first and Adam Ant did back in January.