What skill can be used to suggest an alternate activity if someone is invited to drink?

Well there is so many choices, but I shall give you 2 answers!!!

If someone asks if you would like a drink you should simply say no  thank you!!!

But there are some people who don't want to look weak or scared to their friends, so simply take it, when they shouldn't.

1. YOU can simply just walk away

or

2. You can simply say you don't feel like doing it now (LIE) to the person, who asks you

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