Just a word to the wise, be wary when spending with Revolut in the USA. It works a treat and is perfect for the job, but when at somewhere like a bar where they swipe your card and issue you with a receipt to sign for a tip, the transaction will duplicate (one will be pending) and it will remove both sets of money from your Revolut account.
Eg. If I buy two coffees, and they come to $10. I get my Revolut swiped to pay, leave a $2 tip on the receipt, $22 (original $10 + origina & tip $12) will be removed from your account. Both transactions have the same auth code and the pending transaction will eventually be released back to you, but it can be frustrating not having the money to spend immediately!
My protip, give tips in cash where you can. It will save this from happening to you!