Depends what kind of a night out you like. Meal is easy though - I'd strongly recommend the Firehouse which is down right in the centre of town (on the Waterfront) next to the @Bristol building. Excellent food, friendly staff. Failing that, there is ASK on Park Steet, or Bejing Bistro just a little further up.
As for "night out" there are various clubs and bars but it depends on your musical tastes really.
The 10th is my Stag party in Bristol!
Cheers,
Rich
With our species on the edge of extermination,
with no prospect but a horrible death,
we actually played games.