Move common code into private method, use before_filter
Move common code into private method, use before_filter

1000miles/speakerinnen_liste,rubymonsters/speakerinnen_liste,acid/speakerinnen_liste,acid/speakerinnen_liste,nerdinand/speakerinnen_liste,rubymonsters/speakerinnen_liste,nerdinand/speakerinnen_liste,rubymonsters/speakerinnen_liste,BriocheBerlin/speakerinnen_liste,Techylite/speakerinnen_liste,BriocheBerlin/speakerinnen_liste,BriocheBerlin/speakerinnen_liste,1000miles/speakerinnen_liste,nerdinand/speakerinnen_liste,Techylite/speakerinnen_liste,Techylite/speakerinnen_liste,acid/speakerinnen_liste,1000miles/speakerinnen_liste