Lots is going on Around the Inner Harbor in the next few days: * Tour a destroyer -- The Canadian destroyer Iroquois will be docked at the Broadway Pier in Fells Point tomorrow through Monday. The ship will be open for free tours from 1 p.m. to 4 p.m. tomorrow and Sunday, with arrangements by Sail Baltimore, the new name for Baltimore Operation Sail. * Choose a franchise -- An expo featuring franchises and opportunities for people who want to start a business will be open from 11 a.m. to 5 p.m. at the Baltimore Convention Center tomorrow and Sunday. Admission. It's not a job fair. Information: (303) 799-9700. * Star-gaze -- Actors Jill Eikenberry and Michael Tucker, formerly of the TV show "L.A. Law," will speak at a symposium, "Breast Cancer: Out of the Closet and into the Headlines," at 8:30 a.m. and 2:30 p.m. tomorrow at the Omni Hotel. The symposium is for breast cancer survivors, their families and friends. Tickets are $25 and include a luncheon. Information: 433-7223. * Remember Opening Day? -- Monday was to have been Opening Day of the '95 American League baseball season in Baltimore, hon. The town would have been really upbeat. Oriole Park at Camden Yards, trimmed with bunting, all green and neat, would have been jammed. The Phillies here for an exhibition game tomorrow, the Rockies on Sunday. And . . . Sigh. But you still can eat and drink near the ballpark on Opening Day, with seven Inner Harbor establishments offering a deal: the Marriott Inner Harbor, Strapazza's, Pickles Pub, the Wharf Rat, Balls -- An American Sports Bar, the Camden Pub and the Cafe 250. Buy an "Opening Day . . . Anyway" T-shirt at any of those places and get a free beverage at each place through the close of business. Proceeds will help Bea Gaddy's work with the city's needy. Information: 962-2020. CELEBRATE BALTIMORE: You'll be hearing lots of promotion from Downtown Partnership in the coming week about "The Really Big Show," most of which occurs next weekend. More in next Friday's column. For a sampling of what's to come, visit Harborplace's Amphitheatre at noon Tuesday. Singer Petula Clark -- you remember her 1960s Grammy hit "Downtown," right? -- will perform, a little side gig to performing in "Blood Brothers" on Tuesday through April 9 at the Lyric Opera House. Then from 11:30 a.m. to 2 p.m. Thursday, the lobbies of 11 downtown office buildings will house activities and giveaways: 120 E. Baltimore St., the B&O; Building, the Blaustein Building, the Candler Building, Charles Center South, Commerce Place, the IBM Building, Legg Mason Tower, Signet Tower, USF&G; Building and the World Trade Center. Details: 342-SHOW.