At Spacebase, we calculate with 10 hours/day for bookings and the daily rate you select should reflect that. In order to make your location more attractive, we suggest offering clients a discount so that they are more likely to book your space for 8 hours or more. Instead of calculating the price with your normal hourly rate (e.g. 10 x 30€ = 300€), you could offer the space for 240€ for clients who book 8 hours or more. You could even make it more interesting and offer it for 210€ for everyone who books more than 7 hours.
Discounts like these make your space very appealing for customers, since they get "rewarded" for booking your space for more hours.
If you have questions about how to select the hourly/daily rates for your space, please look here.