HOLIDAY WEEK, PART 5: Grant Richey and Judy Heneghan were the first artists, 16 years ago, to perform in the Bryant-Lake Bowl Theater. Their musical show, Martini & Olive — a character-driven medley of tunes from the 1970s — is still a holiday-season staple at the Bowl, despite Heneghan’s active performance career on Los Angeles stages and Richey’s years-long battle with cancer. 3-Minute Egg dropped into their holiday-opening performance and talked with the duo about their stamina. You can catch Martini & Olive: Silent Night Fever twice every Friday and Saturday night through the end of the year, along with a New Year’s Eve show.