The Long Island Railroad (Metro NY commuter rail) used to operate a bar car on the rush hour trains, as did Metro North. Discontinued years ago. Sorry for the Pintrest link, couldn't find a better photo resource quickly.
https://www.pinterest.com/pin/31032684922734675/
https://www.city-data.com/forum/long-island/885214-lirr-bar-...
https://untappedcities.com/2020/02/06/when-metro-north-had-a...