Once you have created an avatar and joined an event there are a number of ways you can control your avatar and move around the room.
You can teleport to empty seats in the room by selecting an empty seat at any table in the room along with looking around the room by swiping left and right (Mobile) or using your mouse to drag the screen (Desktop)
Below is a list of keyboard shortcuts and hotkeys that can control your avatar.
M - Toggle Mute
T - Toggle Push to Talk (when enabled)
PageUp & PageDown Zoom
Space Toggle Zoom Level
Arrow Keys Rotate around Avatar
Q & E Rotate around Avatar
1, 2, 3, 4, 5, 6 & 0 Avatar Expressions
WASD Lean Avatar