Why is the hero not interested in the heroine's late-night parties?

Generally, parties are common in the modeling and film industry as most of the deals are struck there. Partygoers will get well noticed in the film and model circles and they will be racing ahead with the opportunities, unlike the others. When a beautiful heroine invites anyone for a late-night party then they will jump in joy and readily enjoy.

However, In the midst of all this, people are left wondering why is a handsome and charming hero not interesting in beautiful heroine's late night parties.  This young and handsome hero is making a mark in the industry creating a niche for himself. A beautiful heroine is keen to reach the next level of stardom. Both scored a hit romancing each other on-screen and the heroine wants to score more hits as their on-screen chemistry rocked on the screen.

So, as the hero is getting more offers, the heroine also wanted to make most of its use and started inviting him for late-night parties. The handsome hero who is a little reserved is unable to say know and hurt the heroine and at the same time is not interested in attending the late-night parties. Hero is at his wit's end as to how to escape from the heroine while the heroine is enjoying the rumors linking both of them.