Aruba on Bournemouth Pier is always good for eating with excellent atmosphere. If you fancy a walk, walk along to Boscobe Pier (a mile) and see the notorious world acclaimed "reef" which is still being built. A nice little harvester there too, or walk a bit further past and let the joys of the "Urban Reef" restaurant / bar / cafe entertain you.
Other than that, there is the usual eclectic mix of chain Italians pubs / bars and clubs.