I dump my pennies at a credit union with a free coin machine for members. It (the machine) has got capacity to hold $200 in pennies at a time (4x $50 bags), so the bank employees have to empty it out a few times during my visits. They don't seem to mind too much. I only visit once every month or so, and I keep a high balance in my account.
I typically dump between $600 - $800 per visit. I always bring donuts, and my cute kids come along with me, which helps keep the bank folks friendly.
Last week, I dumped $1,100 in one visit, which is the most I've ever done. Didn't have any problems.
I only dump pennies here, never any other denomination.
Questions:
1) How much do you guys usually dump at a time? What's the most you've done at once?
2) How do you keep your dump bank friendly if you're dumping 10's of thousands of zinc pennies at a time?