Hello. Thank you for your question. In the lease there should be a description of the "permitted use" by which you as tenant can use and enjoy the premises. If this use is described exclusively as "cafe" (or similar) in the lease then you may not have the right to use the premises as a retail outlet. It is also important to make sure that you have approval from the local council and other relevant authorities to use the premises in the way you intend. It may end up being in the landlord's commercial interests to permit you to combine a retail component to your business with the cafe component as the more successful a tenant's business the greater the potential there is for a landlord to secure a long term rental income. You may wish to raise this point with the landlord in your negotiations.