Good map from the good mapper.
This map is a parody to Killing Floor. Your/your team's task is to survive a set of waves in the hotel. Every new wave has much stronger enemies.
The distinctive feature of this map is the presence of classes for team members - medic, support, sniper and heavy weapons guy. Each class has its features and tactics, while medic and support have their own stocks, which open for the whole team during the pauses between the waves.