I was reminded of an embarrassing story from my youth today. Might be a bit long, so bear with me. Went to see Aliens at the cinema around 1986/87. Me and my girlfriend at the time were running a bit late, so we were rushing down the street in pouring rain under an umbrella. It was dark, but we saw a huge Aliens promo poster in a window and assumed we'd arrived at the cinema, so we rushed in out of the rain, not knowing we'd actually entered a bingo hall.
The place was very grand looking for a bingo hall, and the foyer looked just like you'd expect a cinema to look, although we were in a bit of a rush, as we didn't want to miss the start of the film, so we might not have been paying too much attention.
We went over to the fella at the ticket desk and I said, "Two Aliens, please" and he gave me a very strange look because he naturally thought I proclaimed that we were two aliens wanting to play bingo. I remember thinking, "What's his problem? Surly get!" He then asked, "Are you members?" Me and my girlfriend looked at each other with a puzzled frown and muttered, "Members?" in unison. We then quickly filled out a membership card with our names and addresses on, paid our money and headed off to see the film, or so we thought.
We opened these large double doors, which we assumed were the entrance to the cinema screen, but they opened onto a massive bingo hall full of people playing bingo. We looked at each other again and our intial "Whaaaaaat?" reaction was replaced by fits of giggles. We then had a little discussion on whether to make a swift exit or ask for a refund. Despite the embarrassment, we decided on the latter.
When we approached the fella on the ticket desk again, I was briefly tempted to milk it a bit by saying, "We're alien beings from another planet, but don't worry we come in peace, yeah. We're only here for the bingo," but decided against it because I thought my girlfriend might be mortified. We explained what had happened, he had a good laugh, gave us our refund and directions to the cinema, which was round the corner.
We received our bingo membership cards in the post a few days later.