Once you have a confirmed session, you gain access to client's notes and session history. We would generally advise to read these to get an idea if the client has any injuries or have a specific goal they are currently working towards.
If this is your first session with this client, send them a text message to introduce yourself. If your venue is difficult to find, we would suggest you include directions in the intro text, e.g. 'it's right by the yellow door' or 'under the scaffolding'. You can include tips like 'there is a parking space right outside the studio' etc. Also, let client know where you are planning to meet them. Please always meet your client either reception or outside of the venue.