THE GOOD HOTEL, SAN FRANCISCO
What you'll find: Chic and cheery, the Good Hotel has a clear eco-conscience: Key cards are made from recycled cardboard, chandeliers are fashioned from recycled glass bottles, and most of the 117 rooms have ultragreen toilets.
How you can volunteer: Just pick up the orange phone in the lobby to connect to the nonprofit One Brick, which matches visitors to short-term service gigs. You can roll up your sleeves for a few hours at the San Francisco Food Bank or join a day trip with wetlands conservation group Save the Bay, planting native seedlings along the shores of the Palo Alto Baylands.
What you'll spend: $99 per night on weekdays; $109 on weekends ( jdvhotels.com/hotels/good )