Half of my jobs are instrumental only jobs. Usually, they are corporate coctail hours before a meal and meeting.

On my regular restaurant gig, I do instrumentals only the first hour, limited vocals the second hour, and about 60% vocals the rest of the night.

What's appropriate depends on the requirements of the individual jobs.

For my little part of the world, it would be easy to work four nights a week as a solo
instrumentalist.

Also, it seams that a solo act with the ability to do a lot of instrumental only material has morre staying power at long-term gigs. Customers don't get tired of the variety of material.

Russ