Hey @R_H,
Unfortunately, we do not have plans to offer pay per session or 24 hour pass subscription options.
Our mission is to make our users faster through structured training plans, ride analysis, and season-long power analysis tools. We view TrainerRoad as a complete training system, and we want to dedicate our resources to continually improve that system. Sadly, developing pay-per-use access would distract from that mission.
That being said, we do have a 30-day money-back guarantee, so you and your riding mates could give it a shot for a month before seeing if you want to continue your subscription 
.