Danny Sullivan dreams of gardening and spending time with his grandchildren, but that's just a fantasy. Retirement is out of his reach, at least for the foreseeable future.

The 62-year-old founder of a small catering company spends his days helping stock bars with beer and ice, wooing potential new clients and juggling the 20 to 30 different events his firm handles daily.

"I am so tired," he says. "I don't know that I'll ever be able to retire."

The weak economy has been tough for small-business owners across the board, with their total revenue inching up by just 3% since 2007 and declining in fields such as construction (-12%), real-estate services (-3%) and retailing (-2%), according to financial-software maker Intuit Inc. But for entrepreneurs in their 60s and 70s, the consequences have been particularly vexing.

Many of them are stuck in "business purgatory," unable to retire and forced to hang on for a recovery that economists say could still be a long way off.