Firstly - well done Beany and her cafe.
The customer is NOT always right
Agreed. You just don't let on that you disagree.
the customer is not royalty
Sometimes they are
and if you have the front to treat another person in such a disrespectful way, you should expect it to be returned to you with bells on.
That is precisely my point. You (cafe owner) are treating me (customer) disrepectfully. Personally I wouldn't kick up a fuss, I just wouldn't return. Put it a different way. I work for a party organiser. Some of my clients are right c*cks. If I'm charging them £200, 000 for a party, can you imagine what would happen if I walked up to them during their event and said "I think you're a bit of an arse. Next time, I'm going to charge you £250,00, just because I can". Do you really think I'd get any more business?
Practically, it's "yes sir, no sir, 3 bags full sir, would you like to sleep with my wife sir".
£2 isn't a premium for a good coffee, far from it.
Depends whether it's a *GOOD* coffee or not. £2.50 for a taste orgasm is acceptable. £2 for another bucket of muck that gives me heartburn ain't! I certainly don't believe Starbucks/Nero etc can justify their prices.
Anyway - away from all that.
I think my business model would be to make in & out drinks the same price, but put a 10p/cup excess on drinks served in paper cups, which, clearly advertised, would go to carbon offsetting the cost of producing the cup. I'd give a corresponding discount for those who turned up with their own cup/mug ("or why not buy one of these nice travel mugs we have on display here").
Also, surely it's of benefit to keep customers on the premises? Give me a seat, and a paper and I'm more likely to order a pastry. Oh and yes please, could I have another drink, and 30 mins of Wifi please etc etc. Once you've got the punters trapped in your web of quality caffeine, it's quite easy to milk them nicely with good product and great service!