Inna Povedskaya on Peter Demens: Russian biographer speaks, 2 p.m., St. Petersburg Museum of History, 335 Second Ave. NE. Her new book, Vesegonskii Amerikanets, (The American From Vesegonsk), is based on the founder of St. Petersburg. $5, free for students. Call 894-1052.
Vegetarian Food Fest: Asian and Vietnamese food and music, 9 a.m. to 3 p.m., Southwest Florida Buddhist, 1770 62nd Ave. N, St. Petersburg. Free admission, charge for food. Call 520-9209.
Tampa Bay Job Fair: Employers showcase their organizations and promote job openings, 9 a.m. to 4 p.m., Coliseum, 535 Fourth Ave. N, St. Petersburg. Call 892-5202.
Pre-Clovis: True or False? The View from a Site in Marion County: Barbara Purdy, emerita professor from University of Florida, discusses the early history of Marion, suggesting that people may have visited the site 25,000 years ago, 7 p.m., Weedon Island Preserve, 1800 Weedon Drive NE, St. Petersburg. Free. Call 453-6500 to register.
Landscape Design 101: Learn the essential elements of designing a unique garden setting, 11:30 a.m., Sunken Gardens, 1825 Fourth St. N, St. Petersburg. Box lunch served, cash bar available. $20. RSVP at 551-3102.
Tommy J and Sally: Modern twist on the story of Sally Hemings and Thomas Jefferson, 8 p.m., Studio@620, 620 First Ave. S, St. Petersburg. Features Reginald Robinson and Magali Naas. 8 p.m. today through Saturday; 7:30 p.m. Sunday. $20, $10 for students and seniors. Call 895-6620.
Dogology: What Your Relationship With Your Dog Reveals about You: Meet Sarah Wilson at a book signing and behavior demonstration, 6 to 9 p.m., SPCA Tampa Bay, 9099 130th Ave. N, Largo. Wilson, a dog expert, uses quizzes, psychology and humor to analyze why people pick certain breeds and what their choices reveal. Free. RSVP at spcatampabay.org or call 586-3591, ext. 134.
Franz Lehar's The Merry Widow: St. Petersburg Opera Company, 7:30 p.m. today-Saturday; 2 p.m. Sunday, Palladium, 253 Fifth Ave. N. $18.50-$60. Call 822-3590.
Gem, Jewelry and Mineral Show and Sale: Cut gems, inlay work, intarsia, minerals and more, 10 a.m.-6 p.m. today and Saturday; noon- 5 p.m. Sunday, Largo Cultural Center, 105 Central Park Drive. Free. Call 894-2440.
AAA Travel Show: Vacation ideas, planning and specials from cruise and tour companies, 11 a.m.-2 p.m., Pinellas Park Performing Arts Center, 4951 78th Ave. N. Free. Call 398-3120.
Buckler's Winter Craft Fair: National exhibitors feature country and primitive items, 10 a.m.-5 p.m. today and 10 a.m.-4 p.m. Sunday, Coliseum. Sample fudge and gourmet food. $6 both days; free for kids under 12. Call 892-5202.
Discovery Hour: Discover a great work and handle related objects, noon, Museum of Fine Arts, 255 Beach Drive, St. Petersburg. Features Georgia O'Keefe's Poppy. Free with museum admission. Call 896-2667 or go to fine-arts.org.
Seasonal vegetables: Learn how to choose planting location, prepare soil, design a space and plant a winter/spring vegetable garden, 10 a.m.-noon, Weedon Island Preserve. Free. Registration required. Call 453-6500.
Natural History Speaker Series: Learn about bottlenose dolphins' social structure, behavior and communication from Randall Wells, dolphin research manager from Mote Marine Laboratory, 7:30 p.m., Boyd Hill, 2900 31st St. S, St. Petersburg. Free. Call 893-7326.