4 teams numbered 1-whatever. Each team in a corner of the room. Leaders calls out 3 numbers - 1st is the rider and next 2 are the pullers. The rider sits on an old piece of carpet/tarpaulin Etc. and pullers have to pull rider round the room and first team back and seated is the winner. Repeat until exhausted.
Tables on their sides in middle with all legs inwards to form a circle and to prevent people taking shortcuts as well as preventing them bumping into legs. If you tie the table legs it means nothing can fall over and is therefore safer.