Your club may have given you access to block book courts for certain purposes. If so, you'll be able to achieve this in My bookings.
Block bookings are always made in the context of a particular event. For example a tournament or for team fixtures. First choose the event for which you wish to make a booking. You'll then be presented with a screen that allows you to single click any number of courts to reserve them for the purpose of this event. Please refer to this article for details on how to operate this booking screen.
You will only be presented with courts and times that the club's booking manager has opened to you for this purpose. If any court fee is due (and this is also set by the clubs booking manager) you will be charged the day before the booking time. This is different from personal bookings that are only charged immediately after the booking time. Once a court has been charged for it cannot be refunded by the system. You may still free up the court, but the charge will remain.
If the booking is for a team event you'll also be asked to give the team for whom you are making the booking. If ManageMyMatch has been used for full fixture management, then you'll be able to choose the fixture as well (i.e. Team A vs team B). But generally, if this is the case, team captains or the clubs team manager can set up fixture bookings quicker and easier using the scheduling feature in My teams.