Most voting places are either schools or churches. But sometimes there are other, more unusual places that are designated for voting.
Personally, I vote in a 'Steamfitters Union." I’m not even sure what a steamfitter is, but I’ve voted in their union building for the last 7 years, ever since we moved to Tucson.
The last time I voted (in 1999) was at the Australian Embassy in Washington DC – I voted in the Republic Referendum, and since then I’ve been off the rolls for being outside the country too long.
My polling places have been an elementary school, another elementary school, a senior citizens’ center, a Catholic church, a synagogue, and now a middle school.
Why on earth would you not just vote provisionally, then?
And to answer the question, I know that during one election, I did vote in someone’s garage. This year, I’ll actually be a pollworker, but not in my own precinct, so I’ll just hand in my mail-in ballot where I’m working that day. It’s at a community center.