Or, just get your own Verizon MiFi device and skip the CG's poor signal altogether.
A few points to keep in mind with the OP's solution:
- CG WiFi's quickly become saturated with a few people when they decide to fire up their streaming video services.
- Some CG WiFi systems are just not setup to handle the throughput that they are intended to handle. A DIY mentality is commonly used where a professional $$ solution is needed.
- Connecting to other AP's outside the CG may work but in some area's could be illegal. In MI you cannot use a WiFi AP without being a customer for example.