You can leave it fr a week and come back with a fresh outlook on it. Sometimes being too in the middle of it can cloud your own judgment.
On a side note, requests: just say you don’t have the song and you have no plans to buy it later.
In 1 party in Spain I was booked to play soulful deep house and 1 Spanish girl kept coming to me every 15 minutes asking for Pitbull. I kept saying I wouldn’t illegally download it and had no desire to buy it. Eventually the manager came over and talked to her and told her it didn’t fit the musical theme ad she left me alone after that. The place was full and everyone else was enjoying themselves til it closed!