"Anyway, that point was, none of the NT letters discussed tithing, or used the word at all in reference to giving, and Jesus only mentioned tithing twice, both times in condemnation of the Pharisees. You'd think they would at least have used the word in context, if it was important pertaining to giving, which they discussed a bunch. And none of the early church fathers did either."
The Jews of the early church probably did still tithe in accordance with the Law. This might not have been mentioned in the epistles because it was a settled issue as far as Jewish life was concerned (Jewish Christians didn't need to hear about it), and wasn't a church issue (Gentiles didn't need to hear about it either, i.e., contributing to the Levites, going up to Jerusalem at certain times for festivals, etc.).
You already made the point that tithes were for worship and celebrations, and for support of the Levites, the poor, and others without means of support. They were partly a tax used for the public good.
Good points, thank you.