Maybe 35 of them?
You can just leave those 35 indexed then.
I would just really like to get rid of most of them. It's so cluttered! Tags make up for nearly 60% of my site. That's no good.
Bear in mind you can delete from being visible in site navigation (remove tag clouds, tags from footers, tags at bottoms of posts) but the tag archives will still actually exist. So you can remove the links on-site without actually deleting the pages.
Like you siad in your posts, tag archives can be thin and Google is not down with that. I want to merge the tags with that Yoast Term Optmizer tool but it isn't available anymore I'm worried about doing redirects because that is a lot of redirects!
If you remove tags from on-page links and noindex the ones that aren't bringing traffic that should solve things. 35 redirects for the rest that are bringing traffic is not too many
I also have a question on categories. I currently have three categories each with 12 subcategories. The subcategories are city names. (I work for a bar that has 12 locations). Is that bad form? Would you set it up differently? And if I have a category named nightlife and a subcategory under it named Baltimore, should i check them both for a Baltimore nightlife post or just the Baltimore part?
I would think about how often you'll post in each category. What you don't want is a category with only a post or two sitting in it for months or years. If you think, after a year, each category and sub category will have say 7-10+ posts in it, than it should be fine. It's all about having each category archive be full of content and unique!