Don't they have homes?
Why can't you meet there?
I would imagine there are other public places in Cork
which don't cost money to be in where you can visit.
It seems like your room mate has been pretty patient
with the relapses and other issues you've had.
Is it really worth alienating her by bringing in people
you've met at meetings with whom you've only had a
short-term knowledge?
I wouldn't like relative strangers hanging around in my house
when I wasn't there either.
How long have you known this person / people?
It is much more common from my understanding to
spend time in public venues after AA meetings--
having a shared home means some compromises.
I agree with Beccy--find a way to let go of this before you
end up compromising a good living situation.