You can hire coaches and minibuses for a picnic with all the office employees or if a lot of them have to be transported for a couple of days for some training. Or you may hire a coach or minibus for a wedding when there are so many people who have to be picked up from the airport or station and taken to their respective hotels and from there to the wedding hall and back. Rather than hiring a couple of taxis, a coach or minibus would serve the purpose just as well, and it will turn out to be far cheaper too.