This is interesting. When my mother was growing up, folks she knew abstained from meat on Wednesdays & Fridays throughout Lent. I know, when I worked in restaurants, we always had meatless options on those days.
From everything I can find, though, folks really only seem to abstain from eating meat on Fridays during Lent, but it's totally fine to eat meat on Wednesdays (except Ash Wednesday).
Did that change at some point? Are there different rules for different parts of the country/world?
And, for those who are interested, here is what Martin Luther had to say about it in the Augsburg Confession:
"We do not condemn fasting in itself, but the traditions which prescribe certain days and certain meats, with peril of conscience, as though such works were a necessary service."
So, I guess that's why, as a lifelong Lutheran, I've never really known much about the rules of fasting during Lent.