Just as indoor climbing gyms offer a controlled wall to ascend, an "indoor tree-climbing gym" can offer a controlled tree—or better, forest—to climb & traverse. A climbing wall provides a primarily 2D challenge, but a tree or forest provides a 3D challenge. Climbers can be challenged by difficult limbs set far apart, or be challenged to reach waypoints in a certain order, or (crossing over with parkour) finish within a certain time. Other sports could probably be done but "in the trees".

Soylentant: a restaurant serving tasting menus of all Soylent drinks & bars, with recommendations from the "soylemmier": "Ah, the August 2016 Soylent bar… A fine vintage. Usually⁠." Also sells a cookbook for hackers: From Zero To Yum.

Uber—for VR, using Uber. (How often are you using your headset anyway?)