You can quickly swap tables around in simpleERB using the diary view's quick move feature.

You can do this by selecting the table number in the diary view as highlighted above.

This will bring up the quick-move box.

You can then enter the table number you wish to switch this too

and if the table is available the swap will be made.

Please note this feature only works on active bookings, which is, a booking that is still within the table's set stay time and not marked as 'table ready'.

You can see this feature in action here >>>