Is it possible to add an option like :include_blank => \'Please Select\' in a method select_tag like it is possible with the select
The select_tag method does not modify the options list you pass it. If you want a blank option you have to include it in your list of options.
If you're using options_for_select your list should start with the blank item, ie: ["Please select", ''].
If you're just passing html to select_tag make sure your first option is: