first time i have seen this question...........and it is a good one.......
the number of exotic bets a book will take depends on the following
1. type of event........(big event ie. superbowl, MNF, ect)
2. type of player (square or sharp)
i cant speak for large offshore shops, but to give you an idea of what a square shop of around 150 players does.......on a typical mnf game, a square ticket might read...
$100 on the side
$100 on the total
$100 parlay
and a $100 tease for good measure.......
if a shop is made up of squares, you can expect to have a very high percent of exotic bets.......