As if concerts aren't pricey enough....
Live Nation has started charging an additional $5-$30 for aisle seats.
Live Nation counts these seats as "premium seats" because of easier access to bathrooms and snack stands. The price increase can potentially be applied to the aisle seat and the next 3-4 seats next to it.
Luckily, the price increase doesn't apply to all concerts or venues yet. The price increase must first be approved by the promoter and the artist.
For more information, check out this Ticketing Business News article.