Re: What In Wexford??
Are you staying in Wexford town?
JFK park is ok if you are into walking etc but it is a bit of a spin from Wexford (20-25 miles). If you are down for the full w/end you could easily spend one full day going around all the narrow streets in Wexford shopping, browsing etc etc. Curracloe beach (where Saving Private Ryan was shot on location) is approx. 5 miles from town and is really beautiful- 8 miles of golden sand.
Bars etc for mid 20's- The Stores is generally where it happens late, while The Crown Bar, Chocolate, La Speranza, & The Sky &The Ground are also very good.
Food- Riverbank House does a great lunch. For dinner- Fordes, Mange Tout, & Taste are all very good & centrally located in town. The Lobster Pot is a quirky little seafood place that is also quite good but is in Carne (12 miles). I am biased but Wexford is almost the eating & drinking capital of the East coast so I wouldn't worry about finding good bars or restaurants.
If you just want to chill out there are loads of fast food joints- KFC, Burger Mac etc and Leisure Max which has bowling etc etc.
All the best & I hope you have a great time. Only tip I'll give you is that the "Sunny South East" is not as bloody sunny as we would like everyone to beleive.