"Fucking angry and dispossessed" would be my immediate choice, I feel.
But I started reading FWR roughly 18 months ago.
I think, back then and given that situation, I'd I have made an excuse to go to the loo and then scuttled off out, never to return.
But today, thanks to the women of Mumsnet FWR: I'd refuse - politely, in a professional manner - and ask to speak to management. And give management chapter and verse, in a reasoned manner, on biological reality etc. And I'd be asking them for their relevant policies and whether they have carried out an Equality Impact Assessment on such situations, and if so, its methodology, and could they please provide a copy of such a report.
I've learned so much from FWR.