As the previous posters have stated, a 165 LSAT is enough to get you into many law schools even with a lower GPA. Top ranked schools will be out, but it should be sufficient for lower ranked schools.
As far as whether or not you should take additional classes to raise your GPA, it depends on much it will actually change. I doubt if eight additional classes would make much difference. The fact is, a school that isn't going to accept someone with a 2.5 (regardless of LSAT) probably isn't going to accept someone with a 2.7 either.
165 is a good LSAT score, and I'd be wary of retaking unless you really believe you'll do better. You may score lower on a retake.
Here's something you need to consider, no matter where you go:
I was a non-trad student and went to law school while juggling kids and a mortgage. It is an unbelievably difficult grind. Law school makes undergrad look like a joke. The amount of work you will be required to do just to maintain a C average (especially the first year) is overwhelming at first. Your LSAT score indicates that you have the intellectual capability to succeed, but you need to make sure that the obstacles that interfered with your undergrad GPA are resolved before you start.
If you can't dedicate yourself 100% to law school, it won't turn out well. I'm not saying this to be negative, but I have first hand experience with the rigors of balancing law school with other competing obligations. It's something to consider before dropping $30-40k on year's tuition.
You may want to look at part time programs. I went to law school at night and completed my JD in four years instead of three. It's more like 3/4 time instead of part time, but it helps.
Make sure your family is totally on board with the idea, and understands the time commitment you will be required to make. I think a lot of people think they understand what it means, but really don't. Your weekends, holidays, and every spare minute you have will be spent preparing for class and exams. Having a supportive family is very important.
Good Luck with your decision and feel free to message me if you have any questions.