Send a comparable brief
Include the venue address, date, guest count, serving hours and busiest ordering window. State whether you want hosted drinks, guest-paid drinks or another arrangement. Specify the menu you are comparing.
Separate the inclusions
Ask each operator to list the cart or bar, equipment, baristas, drinks, cups, travel, setup and cleanup. Check whether tax, parking, venue fees, extra staff or longer service add to the total.
Read the drink allowance
A per-person package, a fixed drink allowance and an hourly service are different offers. Ask what happens if fewer guests attend, if guests order a second drink or if the agreed allowance runs out.
Check the terms behind the price
Review the deposit, final payment date, guest-count deadline, overtime and cancellation or postponement terms. Ask who pays if the venue changes the setup. Keep all agreed changes in writing.