If you are providing Membership Swipe Cards to your member's when they are registered, these can be used to enter their names onto bookings.

To use the Membership Swipe Card in a booking, from the individual booking screen, shown below ...

Swipe the card through/over the reader whilst the name box is highlighted.

Characters similar to those shown above will briefly be displayed in the box.  This will be converted to the customer details, as in the example below.