You can check out the website Greekrank. It’s where students rank the frats and sororities. Kinda like RateMyProfessor but for Greek chapters at specific schools. So bear in mind the fraternity and sorority members are mostly the ones doing the ranking so it will be biased in favor of Greek life overall but should note if there is not a good Greek scene too.
For example here is a link to the review and discussion of UNC-Asheville I picked it because we toured there and I know it has very little Greek scene at all (no houses, just a couple of frats that have a little space in the student union). University of North Carolina at Asheville - UNCA Reviews - Greekrank
Vs Santa Clara Santa Clara University - SCU Reviews - Greekrank
Vs Alabama University of Alabama Tuscaloosa - UA Reviews - Greekrank
That said it’s about the quality of the Greek life at a school not the quantity. I think if you are looking for little to no Greek Life then a C or D rating is a sign that it is not important, but a school could have an A rating but have a fairly small percentage of students participate but it’s “high quality” participation, like UNC Chapel Hill which has a little less than 20% of students involved in Greek life.