Ottawa can be fun anytime, unfortunately CA is right and it is miserable this week.
Saying that, and that its a bit of an in between season, you're probably best to stick to Barefax. There are always a good selection of girls there, and if its not great you can go for a drink in any one of many places within walking distance. Empire grill is a nice steak place, there is a mexican place literally a 2 min walk (can't remember the name, pm me if you want i'll find it) and lots of good scenery.
Downtown is a little slower, but the pubs are always busy for the afterwork crowd, grab a beer and relax, enjoy the locals. Usually a friendly place to strike up a conversation.
I haven't had the opportunity yet but google jessica massage ottawa and you'll find a woman providing nuru massage (google that too if you must) who is in extremely high demand. I've tried to book and will at my first opportunity.
There is also a new hostess club that is supposed to be nice, although membership is 200, might be a bit much for an occasional visit to town.
Barbarella's, haven't been in a bit but went by last week and it seemed pretty dead, again I think barefax is likely a better bet this time of year depending what you're looking for. Pigale's is always fun, but a bit further again.
Enjoy! Ottawa is a great city any time of year. If you're serious about hobbying there is another board with a little more info on ottawa. Also, I know an agency that gets young, relative newcomers at a reasonable rate. again if you're interested pm me and i'll get you their info.
have fun!
tc