Tables should be inserted as images, using the “Insert Image” button in the text editor. (See the FAQ on Adding Media).
This will allow visitors at the conference to tap on your Table and expand it to full screen for easy reading.
To do this, create your table in a spreadsheet, presentation, or word-processing program. Then either export it as a JPG or PNG file, or take a screenshot of it.
Make it as large as possible (up to 1920×1080). This will allow you to include as much detailed information as you need, and make it easy for your visitors to read it at the conference.