In my city there is about 10 places where you can book a rehearsal for your band. You simply paying for hours and practice with your band.
But the process of booking is painful. The main inconvenience is that all of this places are not connected in any way. You have to manually search for them and talk to owners about available time. Zero interactivity.
I've never spoken to rehearsal base's owners, but I'm guessing that they have outdated way of managing their bases. It is probably some sort of textbook, maybe excel.
I would like to aggregate all rehearsal stuff in one place. There will be list of all bases, very good search engine and filter, so band members will find a place to gather in no time and without any effort. Each base will have interactive schedule updated in real time, no more talking to owners, just pick your hours and book it.
And for owners there will be management page, where they can see how business is going, all relevant statistics and information.