For example, Twitter is a social tool that requires very little time to use, it is much easier to send a quick 140-character tweet out during or after lunch than to carefully curate visually-driven boards on Pinterest.

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Couples are still welcome, but so are colleagues getting a business lunch, girlfriends catching up over a quick mid-week dinner, families enjoying a relaxed weekend brunch, and diners grabbing supper for one at the bar.

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