Carm, I'm in the same shoes you are -- no more laptop.
Here's what I've found:
The library on Parr will let you use the computer for 45 minutes if someone is waiting, unlimited if no one's waiting. They're open late on Thursday evenings.
Savanah's puters automatically shut off after one hour of use regardless if all 10 puters are being used and people are waiting or you're the only one there.
Mark Twain's have a 30-minute usage if someone is waiting.
Now, if someone has an old laptop they don't need .....