Wiktionary
evening out
n. Spending the evening away from one's usual residence. The phrase typically implies going to a restaurant, going to watch entertainment, or other types of urban nightlife, starting from about 6 p.m. to 8 p.m. and lasting until approximately 11:00 pm or later. vb. (present participle of even out English)
Usage examples of "evening out".
One evening out in the maize-field, where we had been harvesting maize, breaking off the cobs and throwing them on to the ox-carts, to amuse myself, I spoke to the field labourers, who were mostly quite young, in Swaheli verse.
Almost as though they could pretend that they were just a bunch of friends on an evening out.