AV is used extensively in the US in various city- and state-level elections (where it's called Instant Run-off voting, which is actually probably a better description of the way it works). It's used to elect the Irish and Indian presidents, and to fill vacancies amongst 92 hereditary peers in the House of Lords. It's used in elections in New Zealand and for by-elections in countries that use STV (like Ireland, New Zealand, Scotland)

It's also now used to decide who wins Oscars, if that is of interest!

This isn't necessarily the case - in Australia, for example, AV counts are done manually.