The commuter said the music was so loud that it could be heard from other parts of the cabin.
The initiative is exclusive to members of its RedMan Rewards loyalty programme.
It all started when she walked into a beading shop along Arab Street and found a creative escape.
The woman claimed that her daughter had sponsored her trip.
The move effectively raises the average monthly salaries of most local bus captains to more than S$4,000.
The man who wore the cap was issued a stern warning in lieu of prosecution.
The victims were found unconscious in the same room.
Mr Baey thanked the residents and volunteers for a successful screening.
Grab said drivers may receive cleaning fee reimbursements for such incidents when the required documents are provided.
Ticketed yoga and sound bath sessions will also be available on selected Saturdays throughout June.