The handsome new restaurant inside the recently revamped Hotel Theodore is a handy downtown destination for late-night negronis, some perfectly grilled seasonal rockfish before the theater, or just a glass of Washington wine and an ocean-leaning snack, like slices of Sea Wolf bread heaped with coconut- and fennel-rich crabmeat. Rider’s prices reflect both its hotel location and the carefully sourced proteins, but the happy hour menu runs the gamut from shaved kohlrabi salad to crisp, herb-dusted fries.