Is there a classic era server that still has people playing on it?

[Asma-bloodsail-buccaneers]

Whitemane cluster for PVP and Mankrik for PVE. They connected servers and are offering free transfers as seen here.

Free Character Transfers Now Available -- WoW Classic Era

We have made the following WoW Classic Era Free Character Transfers available in this region: From To Realm Type Atiesh Mankrik Normal Azuresong Mankrik Normal Bloodsail Buccaneers Mankrik Normal Myzrael Mankrik Normal Old Blanchy Mankrik Normal Remulos Mankrik Normal Arugal Whitemane PvP Benediction Whitemane PvP Deviate Delight Whitemane PvP Earthfury Whitemane PvP Faerlina Whitemane PvP Felstriker Whitemane PvP Grobbulus Whitemane PvP Heartseeker Whitemane P…