I get the impression that many people are unaware how much our night time bus services have improved in Dublin in recent years.
This is a map of the current network - red is 24-7 services; green is Nitelink services (Friday & Saturday only).
This will improve as the BusConnects Core Bus Corridor projects are rolled out with many of the green routes here becoming 24-7 routes.
Full list of current services here: https://www.transportforireland.ie/getting-around/by-bus/night-services-dublin/