What are some unique/interesting aspects of the culture at different banks? BB/EB/MM

Hey to my fellow monkeys. I was searching for any info on culture/unique facets beyond just "really great internal culture" on some different banks and couldn't find much via the search bar. I thought it would be insightful if some of the experienced monkeys could share things (culture, unique facts, atypical internal structure) they know about some of the different banks undergrads are probably targeting this time of year so that this thread can be one of those go-to reference posts.

Any of the BBs
EBs like Lazard, Houlihan, Centerview, Greenhill, Moelis etc
Some MM banks like Raymond James, William Blair, Baird, Stifel, Harris Williams etc