Last night I approached a 2set.
Sat myself down on one of the chairs by their table and said:
Sup girls!
I've got a favour to ask you:
My grandma is visiting this weekend, but she doesn't havr anywere to sleep.
Can she stay at one of your's?
They looked like they didn't know what to say, but they did say:
No, I don't think so.
I said: Really? You've got no empathy for older ppl?
They: No, sorry.
And then they continued speaking with each other.
I said to my friend at the bar: Hey! There you are!
And walked away to him.
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Aftermath
It appeared they were too sober(or lacked confidence) to be playful.
Also, I recall my bodylanguage was a little bit weak.
I leaned in a bit

stupid...
BUT!!! Even if I would've done everything better, I feel they still wouldn't be happy to talk.
Were they too sober?
Too boring / no confidence?
Or should I have started talking about something else?
Walked away sooner as I found they were in a DoNotApporachState?
They were like a pair of 6es.