The Tuesday tradition that is Park Street Tavern's weekly jazz jam celebrates its four-year anniversary tonight. For $3 (and a can of food if you're feeling generous), this is your chance to step on stage with hosts Pete Mills, Erik Augis, Reggie Jackson and Andy Woodson plus gobs of other local jazz masters. Ready to improv with some of the city's top talent? Just want to get a taste of what Columbus cats have to offer? Head to the bar, located at 501 Park St., around 8:30 p.m.