if you r under 18 as your profile says, you won't be allowed to the bar with or without anybody.. and what is this weird question, whether your married friends need a marriage cert to enter the bar or hanging out...
you sound weird.. you are under 18, and you live in 2 BR flat alone? and work as an instructor? Instructor of what? Who you can instruct in your 'under 18'?

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“You become responsible forever for what you have tamed”. Antoine de Saint-Exupéry