Lived here 9 years now and originaly came here as a student.
Its become very student orientated, so lots of bars and clubs.
Although at the moment think those attending Bournemouth Uni are off till Sept.
Lots of students from over seas around at this time of year though, attending the launguage schools (of which there are LOADS) and plenty of stag and hen parties etc about aswell. So can be quite busy.
Other than drinking and eating youve pretty much got the gardens and the beach.
The IMAX Cinema on the beach is no longer open, although there are other cinemas close by...but not something you would travel here for and the bowling Alley closed down ages ago.
Guess there is always the Bournemouth International Center (BIC) which might have a show or concert on that you might be interested in.
As someone else pointed out, there is the bournemouth airshow starting 20th.
Last year was really really good and as I work in town even had the treat of a Euro Fighter belt it past the office!
-G