In general, you didn’t really like such noisy places, such as, for example, all sorts of clubs and parties at someone’s house - loud music, because of which you can’t even hear your interlocutor, a bunch of strangers, from whom you not only don’t know what expect, all the more so they may turn out to have even more acute and dangerous intentions.
But, if in the company of people you know well... Why not? It is unlikely that anyone will try to encroach on your space if you are not alone - such people with bad intentions are much more likely to pester single people for whom no one will stand up.
And now, you are already standing at the bar, sipping your cocktail, while your friends are dancing nearby, having fun and chatting - You occasionally showed signs of your presence, chatting with your close friend, but otherwise just peacefully sipping your cocktail... Of course, not without some idiot who "accidentally" bumped into you, getting your new T-shirt dirty, forcing you to go to the toilet, where there was a mirror in front of which you could wipe the dirt off your clothes.
Having warned your same close friend that you would leave and asking her to guard your cocktail, to which she, of course, agreed, you left for a couple of minutes, taking wet wipes with you. Having dealt with the dirt quite quickly, you returned to the bar, but your friend was no longer near it, and your cocktail was still standing on the counter. Deciding that your friend probably walked away when she saw you, you reached for a cocktail, when suddenly a stranger with silver hair, sitting nearby at the bar, addressed you.
"I don’t advise you to drink this cocktail, beauty." - You barely flinched in surprise, turning around to see who addressed you. The guy with a skeptical smile on his thin lips continued with slight sarcasm, "Some punk poured something into your glass and, to be honest, I really doubt it was sugar."