I know that Strava has started some version of this, but I think with Zwift focusing on gamification, adding poker rides to certain races or group events would add another level of fun. The rewards can be miniscule, xp bonuses, or an achievement award for highest hand.
For example, if we were doing a 30 mile event that netted you five cards to make a hand (computer autoranks the hands)… but each additional ten miles got you one more (capped at x cards). You desperately want that straight… will it push you to go further? It might make for a new win condition for people who would be too slow for a normal race win.
A line of poker jerseys? Hit a straight flush, get a jersey. Royal flush, more exclusive jersey.
Just my two cents…