Alright, ive got a laptop that ive had for a while. it has a wireless card. worked fine.

i go into starbucks to use their wireless internet and it doesnt work. i got to panera and firehouse coffee and doesnt work there either. i go to a friends house who has wireless and it works.

now its worked before in starbucks/panera/firehouse coffee. did i do something wrong? no settings were changed since last time i was in one of those places.

any ideas?