MineZ-style servers mix zombie apocalypse PvE with player threat: loot towns, contaminated inland cities, bandage healing, and scarce food. Spawn is usually a coastal safe-ish belt; the north gets deadlier.
PvP is typically on outside safe zones. Friendlies exist; geared bandits also exist. Group up if you value your loot.
Not every “zombie” server is MineZ. Look for town names, loot tiers, and healing item rules in the description.