I attended a surprise birthday party for my next door neighbor. I hugged her and wished her well and enjoyed the party. However, I did not bring a gift. The invitation said "your presence is the best gift you could give". I assumed they were requesting people to be there in lieu of a gift. At the party, I noticed there was a gift table set up and many people had given a gift or a card with a gift card in it. Now I feel bad for not having given a gift. Would it be in bad taste to give a card with a gift card in it now that it's a few days after the party? Thanks for your input.