Upvote:2
As @Berwyn says, I always use a commercial VPN when using an unknown network at a coffee shop or other such place for banking or any other activity that involves a password to log on. Your risk is probably as high or higher at your local Starbucks or independent coffee shop than it is at a random AirBnb host's place.
Note that this is totally different from using an unknown computer that may have a keylogger (hardware or software) or whatever installed (and perhaps by a previous occupant rather than the possibly clueless host).
Upvote:3
Technically speaking, whenever you connect to any network, you are putting yourself at risk.
In any case, I am telling you use, your risk is magnified, especially when the site/s you are visting aren't using encryption (i.e., HTTPS/TLS). Packets sent wirelessly can be easily viewed from another computer within the same network, using tools such as Wireshark. If no encryption, information sent over the network is available in plain-text.