Wonderful museum just blocks from the hotels.
Independence Hall, the Liberty Bell, and the National Constitution Center are all on 6th street, congregated near each other, and again, only a few blocks from the hotels.
Casual, outdoor bar for an easy bite/drink. Good for groups!
Great hangout ("urban beach") at Penn's Landing on the river. Many food and drink options, also. It is where we had our first date!
Delicious Spanish restaurant - Good for tapas!
Food hall with 20+ food/drink vendors, close to both of the hotels.