Yes, There Is A Right Time To Dine At A Restaurant Alone
By Elaina Friedman
There is nothing wrong with dining alone, but there's an unspoken rule that solo diners should keep in mind, especially when dining at popular restaurants: Go on the early side.
By dining early, you'll avoid the rush, which might make you feel less self-conscious, and you'll also catch the serving staff in their most relaxed state.
Journalist Rachel Sugar claimed in The New York Times Style Magazine that the best time for solo diners to have dinner is around 5:30 p.m., or even a bit earlier.