How do you react when talking English socially?

The course is coming to an end and perhaps you are packing your suitcases to travel abroad for a few days. You may also spend your holidays on a campsite on the coast. In both cases you will be able to put your language lessons to use but ... will you feel confident when coming face to face with a Brit?

What will you say for example if you have misheard someone?
Pardon? Sorry? What?
Will you ask for the toilet? The loo? The bathroom? The ladies/gents?
When having lunch, will you use a napking or a serviette?
Will you rest for a while in your living room? In your sitting room? Perhaps in your front room? Or will you rather remain in your drawing room?
Once there, will you take a seat on your couch? Your sofa? Or your settee?
Do you have a sweet tooth? Will you ask for a sweet? Afters? A dessert? Pudding?
On your answer to this questions may not depend how well you enjoy your holidays but a prospective job may. Social class is a big deal in Britain and the language a candidate uses may well become the issue when it comes to a tie between two candidates' CVs. Vocabulary and intonation are important not only when it comes to a job requiring a university degree, but for shop assistants  and most client-facing occupations as well.

When in doubt, ask your teacher and start packing. Your holiday trip abroad awaits you!