On 2 servers with real players, out of 7 Steam servers that run it now, farms and empty ones included. Checked 01:23 UTC.
zm_3rooms is a zombie map, made for Zombie Plague and similar mods. It is not one of the maps that come with the game, so servers send it to players when they join.
Over the last 30 days zm_3rooms was the #54 map on CS 1.6 Steam servers, with 11 real players on it at any moment on average - 0.2% of everyone playing. It ran on about <1 servers with real players at a time. Right now 5 people play it on 2 servers, most of them on servers in Germany and Spain. It is busiest on Tuesday around 22:00 UTC and quietest on Tuesday around 12:00 UTC.
Right now 5, on 2 servers from the Steam server list. Over the last 30 days it had 11 real players on average at any moment. Fake servers and bots are not counted.
On Tuesday around 22:00 UTC. The grid above shows every hour of the week in your own time zone.
The busiest right now: Zp.Renegadecs.Ro - Zombie Plague 4.3 Fix6a (4 players), Zombie Revenge: Rebirth | clangt.es (1 players), ! • MAFIACS • ZOMBIEZONE • ! (0 players). The full list is under "Servers running it now", and every server has its own page with its history.
de_dust21,625 players on average
de_inferno206 players on average
de_dust2_2x2116 players on average
de_aztec89 players on average
fy_snow78 players on average
de_nuke70 players on average
de_dust59 players on average
cs_assault53 players on average
de_mirage51 players on average
de_train46 players on average
fy_pool_day45 players on average
zm_foda42 players on average
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