Can I go to the bank for coins?

Excuse me, I was wondering if you could clarify something for me. I'm in need of some coins, and I was wondering if it's possible to go to a bank to get them? I've heard that some banks offer this service, but I'm not entirely sure. Could you please let me know if this is something that's commonly done, and if so, what the process might be like? I'd really appreciate any information you can provide. Thank you!