Sloka Yatra Yatra Raghunatha keeranam is dedicated to Sri Hanumana which means Wherever the praises of Lord Rama are sung, there you can definitely see Lord Hanumana with his hands folded and bowing to Him; thus is his devotion for Rama. 

यत्र यत्र रघुनाथकीर्तनं
तत्र तत्र कृतमस्तकांजलिम् |
वाष्पवारिपरिपूर्णालोचनं
मारुतिं नमत राक्षसान्तकम् ||

yatra yatra raghunatha keertanam
tatra tatra kruthamasthakanjalem | 
pashpavari paripurna lochanam
maruthim namatha rakshasanthagam ||

Sri Maruthi (Son of Wind God), the terror to demons (Rakshasas) is present wherever praise of Sri Rama is sung, with joyous tears in His eyes and folded hands over His head. To Him we offer our salutation (Namaskarams).