When deeplocal computer engineers last spring began developing a new Web site in which users can sign up for pick-up games, they were looking to add another successful project to their company resume and expand their forays into the world of social networking.

But most of all, they said, they wanted to have a little fun.

Pickupalooza.com, the newest project by the mobile software company, was launched two weeks ago to bring young Pittsburghers to parks around the city for informal matches of games like soccer, flag football and Ultimate Frisbee. The Web site is a sporty combination of an Internet dating site and Twitter -- users register on the site and then find or organize pick-up games of their favorite sports in their neighborhood parks. And in the short time since the Web site's kick off, more than 100 people have signed up to play more than two dozen pick-up matches in locations across the city.

"It's a fun way to meet people outside of your social network, which is sometimes a challenge here in Pittsburgh," deeplocal CEO Nathan Martin said. "Hopefully, Pickupalooza can serve as an easy way to have fun in this great summer weather and make some new friends."

Since its start three years ago, deeplocal designers and computer engineers worked to develop programs for major institutes across the city, such as Carnegie Mellon University and the Port Authority of Allegheny County. Deeplocal also consulted on the redesign of Post-Gazette's Web site, www.post-gazette.com, in 2007. But unlike the contracted work they have done for other companies, software engineer Dimitry Bentsionov said, Pickupalooza is deeplocal's pet project.

"Our company is all about trying to bridge the online world and the real world, and we're using our technology to help people in the real world," Mr. Martin said.

In the two weeks since Pickupalooza's launch, deeplocal product evolution specialist Heather Estes said, the company has taken several steps to spread the word about the Web site: At every game, deeplocal staff members hang Pickupalooza signs and distribute Pickupalooza T-shirts, stickers and business cards. They are also looking to popularize the Web site with the help of existing groups such as Bike Pittsburgh, which is using the site to organize neighborhood biking groups for Car Free Fridays.

Pickupalooza is free to all users, who need only create a simple account in order to sign up for games, though they can also personalize their personal information and post a profile picture. Users can search for games by sport, by location or by the day on which the game is occurring. Players who sign up for a game receive e-mail notifications if the game is canceled because of bad weather.

The deeplocal designers think they may soon add additional features like a "maybe" response, if a user is unsure whether he will be able to attend the game, as well as a "twist your arm" feature, for users to encourage others who may be on the fence about attending a game.

Ms. Estes said deeplocal may eventually try to expand Pickupalooza to other cities, but she maintained they would not attempt that until they are confident in the success of Pittsburgh's chapter of the Web site.

While Pickupalooza adds an element of organization and structure to the traditional spontaneity of pick-up games, Ms. Estes said she is not worried that people will find the Web site too rigid; after all, she said, the Web site is particularly helpful for games like tennis, which cannot be played without a partner.

And even though games are organized in advance, Ms. Estes said, people can still serendipitously stumble upon matches in progress at their local park -- and that is exactly what happened at yesterday's soccer match at Schenley Park. Several of the players were members of the deeplocal staff and others, like Utkarsh Ghildyal, said they had recently discovered the Pickupalooza Web site and had come to play their first game with the group. But one player, Adam, simply saw the group kicking around the soccer ball and asked if he could join.

When the soccer match concluded, Mr. Martin explained to Adam about deeplocal and Pickupalooza, and suggested that he register on the Web site and sign up for subsequent soccer games.

"This is great that you guys are doing this," Adam said. "I wouldn't guess that a couple of computer engineers would want to play sports, too."