Client Card or In-Take Form
It will be nice to have client card or in-take form (just like adding a new client under Client menu) with an online URL (just like online booking). This form can be displayed on IPAD or tablet for new client sign-in to gather as much client information possible. If the client card can be customizable according to needs will be even better.
Every time client submits the form, the client will be added under Clients and the form will reset back to take another new client.