Need Bulk Purchasing + Booking Functionality

[JShortDesign]

I am in need of either a bulk quantity app and a booking app that can integrate with it, or a booking app with a feature that will let customers purchase fixed increments of sessions, and then allow to select what days work for them.

The shop is a lacrosse coaching clinic that will sell sessions in increments of 8, 10, 12, and 24 that can then be selected from open spots on a calendar without having to be consecutive.

For example, a customer purchases 8 sessions and signs up to come to the camp Tuesdays and Thursdays for 4 weeks.

I am currently working with BookThatApp, and so far I don't think it supports this feature. The customers have the option to buy what sessions they want from the calendar, but we want to use this buy-in-bulk membership model.  

I have also installed the buy-in-bulk app MultiVariants, but I highly doubt it's going to integrate with BTA the way I need for it to.

Can anyone lead me in the right direction, or recommend another booking app?

Thanks!

[trokana]

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