Perhaps I should have said "wasting all the other customers' time who are standing behind you"? It's simple courtesy. If you're getting in line at the grocery store with a heaped over grocery cart, there's only one line open, and the person behind you has 1 or 2 items, do you let them go ahead of you? I certainly would. And, I can't count how many times people in this area have done the same for me.
If you have a line of people behind you, you've got to be self-centered not to realize that you're holding everyone up. If you're a regular customer, then you know exactly how much your order is going to come to. (We have people who eat the same thing for lunch 5 days a week) - and if they're paying with change, they have it ready. And, at that restaurant at lunch time, there is a line. A perpetual line of people, many of whom have 30 minutes from the time they punched out until they have to punch back in. Don't waste their time! The place is a gold mine for the owner. The employees are paid significantly above what similar types of restaurants pay their employees. (A pizza shop that gives even part time employees two paid weeks of vacation? A pizza shop that pays for health insurance for its full time employees?) I've never seen another place where you can get fresh pizza as quickly. The food is excellent, and you're served fresh pizza faster than a McDonalds can serve you fries.
Okay, and Costcos have longer lines and deal with tons more people than you do each with cartfuls of items. I realize some people let you go first. I get that often because I only visit Costco to buy food for my guinea pig/rabbits which is really just 2 bags of lettuce at $1.99 each. LOL. People let me go. But do I expect them to? No. I think it'd be douchey to EXPECT people to do that.
The same goes with coins. 15 seconds is nothing. If it's an exceptionally slow person searching for that last penny in their giant purse, I can see why a cashier would go "Next."
But honestly, if I saw a place doing this, it'd strike me as annoying. If the line is such a big problem then get a second or third cashier. That's just how it works.
I used to go to college near a famous pizza shop. They're a collective. There's a line that goes out the door and around the block. Being Berkeley and the liberal-mania place it is, it's a cash only place. Yeah? Well guess what, with the 2 cashiers that work there or 1 sometimes and the line around the block, it's an easy 20 minute wait. They sure don't skimp on customer service and rush everyone. Yeah and it's a pretty famous pizza joint in the Bay Area. most people know about it here even if they didn't go to college in Berkeley. This is just an example of a VERY popular pizza joint with a line out the door and they don't need to rush customers. I suppose the place is good enough people will wait.
But what I'm saying is it's not the customer's fault that they need extra time with coins.
If you really wanted to speed things up:
1) Nice prices that after sales tax come to round numbers.
2) Or just flat out price at full dollar amounts. One pizza place I hit up is $2 per slice. $10 for half, $20 for full or something like that. Easy. Pay and go.
3) Hire a second cashier or third cashier or whatever it is
4) accept credit cards
or DEAL WITH IT
It's YOUR business' choice. You complain about lines and having to serve thousands of people, but thousands of other businesses do it just fine. Large businesses do it just fine. If you can't afford to hire more cashiers and can only have 1 guy while there's 500 people out the door, then realize you don't have to serve 500 people. If your want to make everyone wait 3 hours because it's that good, then sure. Why do you have to rush? The pizza joint I gave an example of is perfectly fine with peo[le waiting. People are perfectly fine waiting too. But realize that you're being greedy as a business to try to serve X # of people when its just not possible. Do you really need to serve all those people at THAT speed? Like I said, if your food is good enough, people will wait. Or is your pizza based on volume processing too? Then you might as well be fast food. If you try to process more than you can handle, then you gotta cut corners and skip people and sideline others and try parallel processing. No one's telling you to cut corners and to have to rush people with change.
Furthermore, if your business can't sustain X # of customers, then you need to re-evaluate what's wrong. Can you not afford more cashiers? Maybe you need to cut expenditures in other places so you can hire more cashiers. Maybe you need to cut some costs so you can take credit cards and put one of the new RFID tap pads? I don't know.