I went a couple months ago. I'm taller than those seats are designed for, so I have a pretty good excuse to leave and "streach my legs" periodically. I probably spent 80% of the time standing in one of the lobby areas and my wife didn't seem bothered by it at all. The stadium had wifi, so I was just on here or playing games or whatever the whole time.
The time that I was at the seats, I made a game of noting the logical fallacies, scriptures out of context, and unfounded assertions that where endlessly employed by the speaker. That and try to read between the lines of what their saying, and "jokingly" point it out to my wife. For example, in the stupid drama, at one point one "brother" is seen buying a computer for an older sister. Assuming you're in for your spouse, you could point out that now they're implying that even the older ones should buy computers to log on to JW.org. Have a goal in mind and work towards it.
Also, I found that being subtly negative about the convention in the weeks leading up to it helped poison the experience for my wife. By the third day she was complaining about how poorly it was managed, and how unloving many of the people there where. If you've never seen the "running of the bulls" at the door opening, you might suggest getting there before the doors open on Sunday (when it's the worst) for your spouse to witness the clear lack of love. Try to get relatively close to the doors, then walk calmly to find some seats while everyone stampedes past. That will make an impression for sure.
I counted it a small victory that my wife didn't feel like going to meetings or in service (she was "spiritually burnt out") for 2 1/2 weeks after the convention. Instead of it being a refreshing experience it was a dull, hot, exhausting 3 days punctuated by JWs behaving no better than "worldly" people.