If you're not already miserable, you'll probably love the Greek
Obviously you're going to miserable at a Tom Petty concert. Jesus. If I was working the sound/light board for that show I'd be falling asleep too.
Anyway, the Greek is a CLASSIC venue. I've seen several shows there, and I am more likely to go to a show at the Greek than somewhere else, because of the atmosphere.
It's a gorgeous outdoor venue with a view of the bridges, the bay, etc. Sound is awesome, and there isn't a bad seat in the house. But yes, geriatric ward, you may hurt your toosh on the rock seats.