Anything a little less mainstream which is cheap to get into.
https://en.wikipedia.org/wiki/Ching_Hai
But late night AM, you get "Ministry in the Marketplace with Dr. Richard Hamlet" on WEZE 590. This is the craziest right wingnut radio I've ever heard, even including shortwave. Last week they were ranting on about the "death vaccine".
"By the 1950s, America had forgotten the Biblical principles that it was founded on. In the mid-60s, government-controlled education was implemented. At that time, The Foundation for American Christian Education was formed to help limit that control by educating families and even schools on the . . ."
As for the Loving Hut restaurants... oh, that's what I went to downtown? It did seem culty. They were playing some video on a loop about world peace, etc. I've gotta say, though, their vegan shrimp were quite good - a very good approximation down to the texture.
In the 90s, you only heard this on shortwave, but all changed after the rise of Rush Limbaugh. In the 90s on shortwave: "Janet Reno and her lesbian cronies are going to take our guns!" (this is a direct quote)
I've not tried Loving Hut yet, but I found there are two in Worcester which is not far.
Lots of fire and brimstone, and right wing talk radio. Which isn't that weird, it's what you'd expect given our media ecosystem.
But also really niche stuff. A friend of mine told me there's an AM radio station in NYC which plays nothing but Black Metal.
Many of these stations carry Coast to Coast late at night, which is about as weird as you get.