Zane was a kid but Alvin wasn't. Rob couldn't understand why Alvin was choosing a hospital when he could have easily helped Anya remove the effects of the drug. Anyway, he respected their choice and focused on their security.
He quickly made arrangements for their departure and informed Alvin, "Boss, the car is ready." Then he carried Zane to leave quickly.
However, Alvin's mind was filled with many questions and Anya. Their first time was when he was drugged. He doesn't remember anything and all she remembers was a nightmare.
Alvin wasn't sure how she might react after coming to her senses but he wasn't ready to put her through another worst experience.
With his mind filled with hundreds of questions, he wasn't sure if it was safe to leave the clubhouse when she was drugged.
What if the intention of the person was to bring them out?
They couldn't mindlessly get into trouble. He considered if he could bring doctors quickly.