West Palm Beach has Clematis Street. Bars, restaurants & clubs. A good place to stroll around, have dinner & drinks.
Sailfish Marina is a great spot for lunch or dinner. It's right next to the Lake Worth Inlet. The water is beautiful & peanut Island is about 100 yards away. You can take a ferry over to see JFK's bunker, very cool. Weekends are busy with LOTS of boat traffic at the marina.
Waterway Cafe is on the ICW & is lots of fun too. I think Sunday is reggae night.
You will have to ask locals for driving directions to all above mentioned.
Your wife probably won't mind if you go for a quick drink at Rachael's. It's right off I-95 at the 45th St. exit. Nice place $$$