We were there last November (well, right outside of PC Beach). It was off-season, so there wasn't much activity going on, other than the locals. We went to the movies twice...one theater had a sound system that made my home system sound like THX at Skywalker Ranch, and the other theater smelled of urine. Yum.
If it's open the big club last time I was there was La Vela. Don't know if Spinnaker (next door) is still there or not. Also, don't miss all the head shops and tattoo parlors that are just about everywhere you go on the strip. Since it's summertime, I'm sure you'll see your fair share of people.
If you're really feeling adventurous, there's a great little pizza place down towards Seaside on the Gulf Coast Pkwy (Hwy 90? I can't remember). The name escapes me, but it's right next to a do-it-yourself car wash, and has a white gravel parking lot. It's a white building with green trim, if I remember correctly. Have fun!