Online cc booking,just like playing connect 4 !?

Is it just me but everytime i seem try to make an online site booking its like a strategic game of connect four ?? I seem to be having a constant battle trying to get three or four nights in a row , checking all the time ,trying to add a night as it becomes free again but it is a struggle as the dreaded yellow seems determined to win usually a vertical line of four on a saturday night throughout each month !