As somebody who buy his snack and drink before going into the cinema to see a movie, I agree with you. But sometimes doing a thing 'the right way' is working as a mind shift paradigm. Go in Costa, have one of those £7 chocolate or fancy coffee, sit down and enjoy it. As a reward for you being you. Not something to do every week, but do it at least once, see what you are missing. Doing something different may change you, in a good way.