I typically dismount to use tha ATM. Getting the bike in good position + keeping it there + fiddling with wallet + keeping $ from blowing away in the wind + watching surroundings = too much to deal effectively with simultaneously.
If a cage pulls in behind me, I do push the bike forward as soon as I am done with the ATM, so they can commence their business. The odd looking extra courtesy gets noticed, and is appreciated - good PR for riders.
But I do keep a close eye on the cage occupants behind me - or anyone else around - right glove doesn't go on until everything is stashed, bike is started, and I am seated.