T.REX ROCKS: Have "Dinner With a Dinosaur" at the ninth annual benefit for Project Exploration, a nonprofit science education organization. You'll get to mix and mingle with reptiles (and not the lounge lizard kind) and Dr. Paul Sereno, a palentologist and Project Exploration's co-founder. The event, which includes a cocktail reception, dinner, a raffle and a live auction, takes place within the cavernous Great Hall in Union Station. 6-10PM, $300.
TWO WHEELS, TOO FUN: Check out the "Bike Winter Carnival" at the Flat Iron Building in Wicker Park, where the inventive festivities will include punk marching band Environment Encroachment, banjo player Al Scorch, Schwinntonation (a musical act that uses bikes as instruments), and James Brown tribute band Get Up With the Get Downs. As if that wasn't enough, there will also be a sale of bike-themed merchandise to benefit West Town Bikes and the Chicago Women's Health Center, a raffle and a silent auction. 6-10PM, $5 suggested donation.
TOOT HIS OWN HORN: Esteemed jazz musician Wynton Marsalis will perform with the Jazz at Lincoln Center Orchestra at the Symphony Center tonight. The trumpeter-composer-author (the man is nothing if not a multi-hyphenate) will soon release a new album entitled "He and She." 8PM, $39-$77.