I finally did it! I went out like an adult--without children. Not with my husband though, with a few other moms. We did a 'girl's night out' and saw Momma Mia and hit a bar afterward.
Momma Mia was fun. Don't expect great vocals (they were apparently more concerned with getting stars than singing talent). After getting over the weird, unnatural hand-gestures, the forced-feeling staging of some songs, and the mediocre vocals, I'd say the movie was better than it was bad.