Pics from HubSpot's office expansion (including the Gilligan's Island nap room)

By Scott Kirsner, Globe Columnist

Digital marketing startup HubSpot continues to grow like gangbusters in East Cambridge: last week, the company expanded into a new floor of the Davenport Building, right across from the Galleria mall. The fourth floor space used to house the head office of ZipCar, which moved to Boston last summer.

HubSpot media relations manager Katie Burke sent over some bullets about the expansion:

• The new floor features a nap room, complete with tropical backdrop and porthole windows so people can truly feel like they're escaping from the office.

• The space has Boston-themed areas based on neighborhoods, including The Common, Beacon Hill, the North End, Charlestown, etc.

• There are common areas for collaborative work and informal gatherings.

• Every conference room is named after a member of the 2013 World Series team, alongside one for John Henry, one for Ben Cherington, and one for John Farrell. (Not only is HubSpot CEO Brian Halligan a huge fan, but Burke's husband is director of scouting for the Sox.)

HubSpot has raised more than $100 million since it was founded in 2006 by two MIT alums, and the company is often mentioned as an IPO candidate.

The architectural work for the expansion was done by the Boston office of IA Interior Architects.

Clockwise from upper left: Katie Burke, Hannah Fleishman, Tyler Littwin, Desmond Wong, and Cindy Goodrich.