Ouch...what a blow just to play tennis.
Around here, we have 2 clubs with indoor courts (and there are 3 college prep schools that all have about 6 or 7 indoor courts but I dont think just anyone can use them. Luckily, I'm friends with a lot of the students so I get to hit there sometimes). Anyway, our clubs only charge 6 dollars per hour non-member fee as long as you're hitting with someone who's a member. If you're not hitting with a member and its two non-members, then its $10 per hour.
See, you're getting SO ripped. Course you DO live in Canada where its near impossible to try to hit outside in the winter, Im' sure. I can't see why they wouldn't try to rip you guys since they know its the only place that you can hit during this tie.