While it's true Tennessee hasn't historically been a strong market for U2, neither has Charlottesville or Oklahoma, and they both had 50,000+. I definitely think U2 could have had a decent showing in Tennessee. I think this tour has proved that U2 is pretty much invincible when it comes to selling tickets.
I think U2 missed opportunities for $ by not playing in Tennessee, Ohio, Buffalo/Pittsburgh, Missouri and Winnipeg. They also could have done another show in New England in 2010, another Boston or Hartford. I know they're afraid of not selling out, but I definitely think they could have gotten 40,000 or more in all these areas, which is nothing to sneeze at. Isn't the point to extract as much money as possible from the people?
Good points here!
Also, what BVS said about the economy limiting the number if not the geographic location of tour stops.
Combine that with your pointing out that U2's psychology just does not lend itself to 70-85% full as opposed to 90 or sold out, largely because of the Popmart experience, and there is your answer for why no Tennessee.
Axver noted that U2 hasn't played Nashville since October and only TN once since the 1980s. That brings up a larger point. If you look at U2's touring history, dates in the interior/deep South have been scarce to say the least. I think JT was the last time they did Tennessee, Louisiana and Georgia on the same tour.
When they go South, they tend to stick to the coasts, when they go interior, they tend to stick to the mid west with a heavy focus on Chicago and Detroit.
As for Boston/New England, they most certainly could have done another show and sold it out legitimately. Things were a lot worse in Fall 2009 then they are now or will be in summer 2010 economically. The only reason they are not coming back to Gillette Stadium for 1 is the stupid surveys that some fans(not me) apparently received and filled out after the shows. They asked "will you see U2 here if they come back in 2010?" Most said no, and most cited the goddman traffic. So naturally, McGuiness got scared and said "no."
Its Boston, and its U2, in the unlikely case they don't sell out, they'll come very close and will be able to drastically reduce or comp. the 5/10% left to fill the place.
Oh well, I haven't been to Philly since 1999 and I've never seen U2 in Montreal which I have heard is an experience, so I am not complaining too much about my shows this year.
My personal satisfaction does not, however, change the fact that they could have done very well with a Boston 3.