There are some open casual social rp events for any Horde players to join and rp at - some are weekly and monthly. Every week UCN hosts an undead Tavern night, which has more than ample Horde and Alliance stumble into it. We host it in Ambermill. The focus is undead, but over time its proven popular among all players.
We also host a once a month open casual social for fishing, which moves around the world. There is also the Lordearon Night Market - which is another open casual social rp event anyone can walk up to. Some helpful links to those events.
[H/N RP] UNDEAD Tavern Night - Every Thursday (highly recommend undead characters)
{H/N-RP} Fish Tales - March 25th, 2023 (next date coming soon)