When a tab is open with Rooam, temporary pre-authorizations are placed on your payment card for fraud protection, and will not actually be charged to your card. When first opening a tab, the temporary pre-authorization amount is $25, then increments of $50 as your total tab amount increases.
To reiterate, the $25 hold is a temporary pre-authorization charge to help with fraud prevention for both the guests and the restaurants.
Once your tab has been closed, you will ONLY be charged the final tab total. The pre-authorization holds will reverse within 24-72 business hours of your completed tab, depending on your bank.