Hi ladies, I am slightly confused and would like some clarification on something.  My FI and I have visited several venues.  Yesterday we were given a quote with the taxes (13%) and gratuity (15%)  included in the final pricing.  Every other time it has only been tax.  
My question is, if we were to book at a venue without gratuities included in the pricing, is it normal to tip the venue 15% at the end?  In my case that would be 15% of $20,000 = $3000
Originally I thought of only tipping the manager or bartenders/staff $200-$400 if they did a good job.  I just want to make sure we are doing this correctly before we finalize our venue.