She belongs to a Sunday night dinner club.
These are urban single career women who want to eat out but don’t dare try it on Friday or Saturday nights because those are date nights. To admit no date or the last minute possiblity of a date is intolerable.
They thus hang out together in commiseration and rationalization on Sunday.
Last Fall I went to dinner with my co-worker and his wife. My co-worker is a 64 year old Yale math PhD. His wife is a very accomplished artist with work hanging in the White House. As we were waiting for our food, a group of old men were seated. Some war ballcaps with military insignia. All settled down to discussing the events of the day. My co-workers wife referred to them as ROMEOs. Retired Old Men Eating Out. We joined them in admiring a beautifully crafted airplane model at the table.
There's lots of old, single or widowed individuals in similar circumstances.