It is not okay to have bad hygiene.
John was invited to have a nice dinner with a group of his friends while he was at the gym.
John wants to meet up with his friends for dinner.
John gets a shower and changes clothes before meeting his friends.
John didn't feel like getting a shower after the gym, so he just went strait to meet with his friends.
John and his friends have dinner together as planned, without any hiccups.
John's friends were uncomfortable all evening because they could smell his body odor.