For some reason I was thinking about this in the car this morning and I remembered something that happened a while ago.
Last year I went to SBS with a friend in April or so, and it was held in a pub somewhere near Holborn if I remember rightly... it had moved. Anyway, the pub was "open to all" before a set cut off time like 7 and then after it was just meant to be for the event. We arrived a bit before then and I went to the bar to try to order food for both of us for an evening meal. The guy behind the bar said he was sorry but they weren't doing food now and he couldn't take my order, so I went back to my friend and she looked a bit surprised and said she was sure that wasn't right! So she went up to the bar and came back and said she had ordered our two meals.
It turns out what happened was that they were only serving food to people who were staying after the cut off time and they assumed I wasn't a lesbian, so they didn't take my order.
It would've been easier if they had just ASKED if I was staying for the event rather than just presuming something.
I found it more weird they'd just assumed rather than anything about my appearance