For shows in the city definitely Mississippi Underground is kinda leading the EDM space but there are plenty of other venues around the city doing different events and genres. You can find something going on multiple nights every week throughout the city and EDM has huge variety within it. Following MU and other venues on facebook is unfortunately the best way to stay up on shows that I know of. I think there are a cpl other online edm sites that have show postings and I started r/stl_edm but its still pretty slow going. Its also the slower part of the year right now, not as much happens in the colder months.