Mass add products to multiple leads or clients

Mass add products to multiple leads or clients

We are trying to use Zoho CRM to manage, among other things, the attendance to our seminars. Attendants can be either leads (since we are trying to attract them to other services) or clients. We thought that products would be the best way to register each seminar on Zoho.

Since we have more than 120 attendants to each seminar, it would be better to mass assign the products to selected leads and contacts, instead of opening each one. Is there any way to do that within Zoho CRM?