Well, there's nothing stopping you from sticking a netbook (or a Raspberry Pi? have fun -- hide it inside the case for bonus points) beside the unit and piping WiFi through a serial adapter to the Plus inside the coffee shop, although you'll get some looks 
. If you had 4MB RAM, you could easily run System 7.0.1 or 7.1 on it with Mosaic 2.0.1. The same thing can be done with the old PowerBooks.
Although if I was to do that, I'd use a SE/30 with a Ethernet<>WiFi adapter (and the SE/30 looks better than a Plus) or a Macintosh Portable.
. If you had 4MB RAM, you could easily run System 7.0.1 or 7.1 on it with Mosaic 2.0.1. The same thing can be done with the old PowerBooks.Although if I was to do that, I'd use a SE/30 with a Ethernet<>WiFi adapter (and the SE/30 looks better than a Plus) or a Macintosh Portable.