SPORTS What: Without Limits Productions' race director Candy Panigutti shares tips on triathlon training. Why: No longer do triathlons have to be daunting swim-bike-run races for other people. This is chance for anyone to get into the game. Bonus: Outdoor Divas Boulder hosts a similar talk next Thursday. Details: Thu 6:30 p.m. Outdoor Divas Cherry Creek, 2717 E. Third Ave. Free. For more information, call 303-320-3482 or visit www.outdoordivas.com. OPERA What: For a few musical hours, Neighborhood Flix Cinema & CafÃ© puts the movies aside and shows the famed German opera Tristan und Isolde, filmed at Milan's La Scala Opera House. Why: Not even front row seats at La Scala could provide such an up-close-and-personal performance. Bonus: Neighborhood Flix's opera program continues through the summer, with showings of La Forza del Destino, filmed in Florence's Teatro del Maggio, and La Rondine, shot at Venice's Teatro la Fenice. Details: Thu 6 p.m.; Sun 2 p.m. Neighborhood Flix Cinema & CafÃ©, 2510 E. Colfax Ave. $20. For more information, call 303-777-3549 or visit www.neighborhoodflix.com.