Snags? or a snag?

I suppose the writing was on the wall when A invited a court yard full of people for lunch to celebrate her new barbecue only to have most of them regretfully decline as she had unwittingly chosen Mothers Day for the occasion.

We few invitees without any maternal commitments who accepted the invitation arrived with our barbecue related contributions to find that, without telling us, A had decided to have a non barbecue, sit down lunch instead.

On this surprise, at least, A had gambled successfully. The weather turned dramatically after our arrival...

...and poured with rain whilst we remained dry, eating A's hastily re-jigged kitchen cooked lunch menu.