AAAAAAAaaaaaggghh!
Before Jet we'd have jumped on 'em without a thought. But getting a babysitter on a 'school night' that'll take him until, perhaps 1 or two in the morning if it goes into overtime... so we asked the ticket holder if they let 2 and under in for free if the kid sits in our laps... and found that the Ticketmaster rule sheet says "Children 2 and under free if they sit in a ticketholder's lap" *and* the line "Varys by event."
Then we actually thought about a fifteen-month-old at 1 am in a huge crowd, and, actually with Jet he'll probably just be asleep no matter how loudly the crowd roars, he slept through a party with a band so loud no one could talk over it when he was less than a week old. Still. Then there's the fact that John and I aren't what we used to be and waking up at 6 every morning with a very happy, active Jet who doesn't have any clue what the words "sleep in you'll need it tonight" mean is not very conducive to being coherent at 1 in the morning for a thirty minute drive back home.
We finally had to decide not to do it, and I'm a little sad, but not regretful. I had assumed we'd give up this kind of stuff when we decided to have a kid, and it was pretty cool to *think* about it for a while, but... what's important to us changes.