diff --git a/ruby/lib/jam_ruby/models/active_music_session.rb b/ruby/lib/jam_ruby/models/active_music_session.rb
index 19d2b0884..937f3ad20 100644
--- a/ruby/lib/jam_ruby/models/active_music_session.rb
+++ b/ruby/lib/jam_ruby/models/active_music_session.rb
@@ -314,7 +314,7 @@ module JamRuby
       return query
     end
 
-    # initialize the two temporary tables we use to drive ams_index
+    # initialize the two temporary tables we use to drive ams_index and ams_users
     def self.ams_init(current_user, options = {})
       client_id = options[:client_id]
 
@@ -326,8 +326,9 @@ module JamRuby
     end
 
     # Generate a list of music sessions (that are active) filtered by genre, language, keyword, and sorted
-    # (and tagged) by rsvp'd (1st), invited (2nd), and musician can join (3rd). within a group
-    # tagged the same, sorted by score. date seems irrelevant as these are active sessions.
+    # (and tagged) by rsvp'd (1st), invited (2nd), and musician can join (3rd). within a group tagged the
+    # same, sorted by score. date seems irrelevant as these are active sessions. ams_init must be called
+    # first.
     def self.ams_index(current_user, options = {})
       client_id = options[:client_id]
       genre = options[:genre]
@@ -392,7 +393,7 @@ module JamRuby
 
       unless keyword.nil? or keyword.length < 3 or keyword.length > 100
         w = keyword.split(/\W+/)
-        if w.length > 0 and w.length >= 3
+        if w.length > 0 and w[0].length >= 3
           query = query.where("music_sessions.description like '%#{w[0]}%'")
         end
       end
@@ -404,6 +405,21 @@ module JamRuby
       return query
     end
 
+    # returns the set of users in a music_sessions and the music_session they are in and their latency.
+    # ams_init must be called first.
+    def self.ams_users()
+      return User.select('users.*, ams_users_tmp.music_session_id, ams_users_tmp.latency')
+      .joins(
+        %Q{
+          INNER JOIN
+            ams_users_tmp
+          ON
+            ams_users_tmp.user_id = users.id
+        }
+      )
+      .order('ams_users_tmp.music_session_id, ams_users_tmp.user_id')
+    end
+
     def self.participant_create user, music_session_id, client_id, as_musician, tracks
       music_session = MusicSession.find(music_session_id)
 
diff --git a/ruby/lib/jam_ruby/models/user.rb b/ruby/lib/jam_ruby/models/user.rb
index 23d72ace6..e4549dab1 100644
--- a/ruby/lib/jam_ruby/models/user.rb
+++ b/ruby/lib/jam_ruby/models/user.rb
@@ -292,11 +292,22 @@ module JamRuby
     end
 
     def joined_score
-      nil unless has_attribute?(:score)
+      return nil unless has_attribute?(:score)
       a = read_attribute(:score)
       a.nil? ? nil : a.to_i
     end
 
+    def music_session_id
+      return nil unless has_attribute?(:music_session_id)
+      read_attribute(:music_session_id)
+    end
+
+    def latency
+      return nil unless has_attribute?(:latency)
+      a = read_attribute(:latency)
+      a.nil? ? nil : a.to_i
+    end
+
     # mods comes back as text; so give ourselves a parsed version
     def mods_json
       @mods_json ||= mods ? JSON.parse(mods, symbolize_names: true) : {}
diff --git a/ruby/spec/jam_ruby/models/active_music_session_spec.rb b/ruby/spec/jam_ruby/models/active_music_session_spec.rb
index 9a983034c..cf3a8b9f5 100644
--- a/ruby/spec/jam_ruby/models/active_music_session_spec.rb
+++ b/ruby/spec/jam_ruby/models/active_music_session_spec.rb
@@ -364,6 +364,23 @@ describe ActiveMusicSession do
         music_sessions[1].tag.should_not be_nil
         music_sessions[1].latency.should_not be_nil
 
+        users = ActiveMusicSession.ams_users()
+        users.should_not be_nil
+        users.length.should == 2
+        if users[0].music_session_id == earlier_session.id
+          users[0].user_id.should == creator.id
+          users[0].latency.should == 15 # (5 + 20 + 5) / 2
+          users[1].music_session_id == later_session.id
+          users[1].user_id.should == creator2.id
+          users[1].latency.should == 22 # (5 + 30 + 10) / 2
+        else
+          users[0].music_session_id.should == later_session.id
+          users[0].id.should == creator2.id
+          users[0].latency.should == 22 # (5 + 30 + 10) / 2
+          users[1].music_session_id == earlier_session.id
+          users[1].id.should == creator.id
+          users[1].latency.should == 15 # (5 + 20 + 5) / 2
+        end
       end
     end