Sort of a truncated answer, but tons. Pretty much every money center. Everything from individual investor conferences to quantitative conferences. The annual Options Industry conference is going on in Miami now. Really depends on your budget and what market(s) you want to reach. London, Paris, Amsterdam, and Frankfurt. Asia is fairly hot and they run the gamut of all the trading centers. You would also want to focus on alternative investment conferences. Heres a place to start -
https://www.iiconferences.com/.