A user will not be inconvenienced with logging-in to multiple services in order to interact with different friends, especially if said user is a casual user of the Internet.

用户不会感到不便与登录到多个服务，以互动与不同的朋友，特别是如果说用户是互联网的临时用户。

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Are ride-sharing services such as Lyft, SideCar and Tickengo casual services for drivers to give rides to strangers or are they more like full-time occupations akin to taxis for regular drivers to generate an income?

FORBES: Tickengo's Willie Brown Wants Revenue Cap For Ride-Sharing Drivers

With instant messaging gaining in popularity, companies would like to find a way to initiate casual conversations about their products and services within the IM chat boxes.

BBC: Messaging in an instant

In the interest of disclosure, I am nothing more than a casual user of the eBay sites and services and have no extreme affinity or hatred for the company (no position in the stock either).

FORBES: Still Buying What eBay Is Selling