For scheduling games is there a way? to enable minute by minute scheduling rather than the 5 minute increment?

If there could be a toggle built in that would be nice, as 99% of the time the 5 minute increments are the best option.

Just this fall we are adding a Golf league at the local Golf Course and their tee times are every 8 minutes. With the 5 minute increment it is difficult to allow time preferences let alone schedule the games to be sure not to confuse patrons of the time they are actually registering for. If you have any insight on how to address this or if it is a modification that can be made in the future that would be greatly appreciated.