I do it all the time, that is to say, I think it is legal, there are no signs saying it isn’t. (Wisconsin)
Can’t carry here in Kentucky banks but my wife says it is too much trouble to take it out of her purse and put it in the glove compartment so she ignores it. I always just go through the drive through.
Here outside the people’s republic of madistan, the UW credit union has the no guns sticker plastered on the door. As do most of the national bank chains. I haven’t seen any of those stickers on the banks I do business though. (Away from the walk-in thug areas)