Shy single girls scared of bouquet-tossing?
If the single girls at your reception are too shy to participate in the tossing of the bouquet, there is another option:
Have all the married couples on the dance floor, and start by calling the couples that have been married 5 years or less off the floor. After the next song up to 10 years, then 15 etc. When the longest married couple is left on the dance floor, present them with your bouqet as a celebration of their long lasting love.