A couple of summers ago, a national festival for Finnish-Americans was held in Ashtabula for that reason, out at the Kent State branch. I made a special point of going to it, even though I now live in South Carolina, because my mother's parents, Finnish immigrants who settled in Warren, built a cottage on the lake west of Ashtabula, where I spent many summer weekends when I was a little kid around 1960.
Along Lake Road (Ohio 531) about a mile west of Ohio 45, you'll find a cottage colony named Haywood Beach. Until about 1990, in order to belong to the co-operative association (which owns the land) and have a cottage there, you had to be of Finnish descent. This caused problems for my parents, who inherited my grandparents' cottage, because they couldn't easily sell it. They let one of my (non-Finnish) father's brothers use it, and he paid us the taxes for it because we still had the title to it. Finally, my parents did manage to sell it to a third-generation Finnish-American from Warren, a friend of the family.
Up until sometime in the 1960s, Haywood Beach had a functioning communal wood-fired sauna, which was fired up on Saturday nights. I remember going to the "steam bath" as a kid. It was sex-segregated, with separate "steam rooms" for men and women.