She chose not to go to the gay bar because, as part of a couple of one woman and one man, she had the whole of Prague to go out in. Same sex couples would not have had that freedom to be open about their relationship everywhere. That's what she means by not taking up the space.
I thought it was an interesting article. She's missing a culture she spent a lot of time in and commenting in homophobia which still exists.
I spend a lot of time on the Feminist/Gender board here (lurking). Keeping up with the Allison Bailey tribunal was virtually a full time job. BUT, there does seem to be an element of Mumsnet not prepared to listen openly to anyone once they say they are queer, trans, non-conforming etc. Let's not let this thread become a pile-on.
I am now off to Google exactly what queer means though!!!!