Laptop Will Connect Perfectly But No Internet Access

My laptop will connect perfectly fine to my home network, other private networks, and many public hotspots. But there seems to be an issue recently with a few local hotspots around town here (Starbucks, McDonalds). I can go to one Starbucks and connect perfectly fine, then drive right down the street to another and while I am connected, it says I have no internet access. I've been able to connect perfectly fine here before, but suddenly this problem has continued. I'm completely at a loss for what to do. I've rebooted, disabled and re-enabled the network card, tried to troubleshoot the problem (which results in no information). The darned thing shows me that I am connected with terrific signal strength, but no internet access.

Windows: Microsoft Windows 7 Home Edition, Version 6.1.7600
Internet Explorer: 8.0.7600.16385
Memory (RAM): 2943 MB
CPU Info: Pentium(R) Dual-Core CPU T4400 @ 2.20GHz
CPU Speed: 111.1 MHz
Sound Card: Speakers (Realtek High Definiti
Display Adapters: NVIDIA GeForce 8200M G | NVIDIA GeForce 8200M G | RDPDD Chained DD | RDP Encoder Mirror Driver | RDP Reflector Display Driver
Monitors: 1x; Generic PnP Monitor |
Screen Resolution: 1366 X 768 - 32 bit
Network: Network Present
Network Adapters: Microsoft Virtual WiFi Miniport Adapter | 802.11bgn 1T1R Mini Card Wireless Adapter | NVIDIA nForce 10/100 Mbps Ethernet
CD / DVD Drives: E: HL-DT-STDVDRAM GT10N
COM Ports: NOT Present
LPT Ports: NOT Present
Mouse: 5 Button Wheel Mouse Present
Hard Disks: C: 133.7GB | D: 89.1GB
Hard Disks - Free: C: 89.4GB | D: 88.5GB
USB Controllers: 4 host controllers.
Firewire (1394): Not Detected
PCMCIA (Laptops): Not Installed
Manufacturer: American Megatrends Inc.
Product Make: A4000
AC Power Status: OffLine
BIOS Info: | |
Time Zone: Pacific Standard Time
Battery: High
Motherboard: Micro-Star International A4000
Modem: Not detected