[Baeocystin]

Here in California, at least, yes. The local ATMs give 100s and 50s, and only twenties if you are specifically drawing 20 or 40 bucks.

[ghaff]

That's probably an exception. I'd never depend on being able to use a $100 bill in general. In Massachusetts, I've actually had to do some chasing down of $100 bills as trip reserve money. Not sure I could get anything larger than a $20 from a major bank's ATM. But I guess we're an impoverished state.

[mothballed]

I've never had a restaurant turn down $100, especially if you tell them that's all you have.

Legal tender for all debts.