diff --git a/app/models/hall.rb b/app/models/hall.rb
new file mode 100644
index 0000000..9661672
--- /dev/null
+++ b/app/models/hall.rb
@@ -0,0 +1,3 @@
+class Hall < ActiveRecord::Base
+  belongs_to :conference
+end
diff --git a/app/models/slot.rb b/app/models/slot.rb
new file mode 100644
index 0000000..bb5509c
--- /dev/null
+++ b/app/models/slot.rb
@@ -0,0 +1,4 @@
+class Slot < ActiveRecord::Base
+  belongs_to :hall
+  belongs_to :event
+end
diff --git a/db/migrate/20141012100900_create_halls.rb b/db/migrate/20141012100900_create_halls.rb
new file mode 100644
index 0000000..6825079
--- /dev/null
+++ b/db/migrate/20141012100900_create_halls.rb
@@ -0,0 +1,10 @@
+class CreateHalls < ActiveRecord::Migration
+  def change
+    create_table :halls do |t|
+      t.references :conference, index: true
+      t.string :name
+
+      t.timestamps
+    end
+  end
+end
diff --git a/db/migrate/20141012101004_create_slots.rb b/db/migrate/20141012101004_create_slots.rb
new file mode 100644
index 0000000..379cd0b
--- /dev/null
+++ b/db/migrate/20141012101004_create_slots.rb
@@ -0,0 +1,12 @@
+class CreateSlots < ActiveRecord::Migration
+  def change
+    create_table :slots do |t|
+      t.references :hall, index: true
+      t.timestamp :starts_at, null: false
+      t.timestamp :ends_at, null: false
+      t.references :event, index: true
+
+      t.timestamps
+    end
+  end
+end