Banks where wearing suits are/aren't acceptable?

Suits are fine, just lose the tie

Interned at a MM and going back FT. Everyone was business casual. Wore polos and chinos nearly every day

Xx

If you wear a suit and tie or even just a suit and you are under 26 everyone is going to assume you are an intern. Just comes off as mega try hard imo

My old group made interns wear suit and tie the whole summer as a hazing thing. Came back full time and don't think I wore a tie again until PE interviews 

Visited a boutique recently and I don't recall seeing any of the junior bankers (An --> VP) in a full-on suit.

Mostly business casual. Patagonia vests, button down shirts / dress pants with no jacket or tie. 

I'm sure they keep ties and jackets at their cubicles whenever they're going into meetings / clients visiting the office.

If you came to my former bank in a suit you would get absolutely ripped on - think it’s the case basically everywhere nowadays. If you don’t have a client meeting or something you’ll seem like an absolute clown in a suit, and that’s the case everywhere

Apparently a ton of banks in Los Angeles. I was in the New York office where most people would at least wear a white button-down with slacks. Maybe 20% wore the blazer as well, myself included (though probably 40% would come in and leave with a blazer but not wear it while working). I was on a call with our LA team, and the most formally dressed person had just a polo shirt. The MD said something like "you would be laughed at for wearing a suit in Los Angeles." He wasn't being a dick or anything though when he said that, just joking around.