It is hard to say what will work for you, but we based our recommendations on a study of what was currently on offer, and what customer wanted, so we did some customer research with questionnaires. Bare in mind, this was a small community without many competitors, so our recommendations were mostly focused around spreading people out throughout the week, and stock management, proper menu planning, and getting more people through the doors within the opening hours.
We had to carefully balance out expenses such as heating, rent and rates, salaries, insurance and of course food and drink, which meant we had to calculate to what extent having longer opening hours would be profitable.
Focus opening hours on when people wanted to go to a cafe (This cafe was a bar with live music three times a week, and most of the takings were from alcohol in the evenings, and hot food in the day. It was the only place for "going out" in the village)
Do a proper segmentation of the user groups targeted
For example, monday mornings were always slow, so try get mother and babies in, and target the menu to children especially.
Tuesdays were also slow, so target elderly people on a tuesday with events they would be interested in. Freshly made waffles on both days.
On the food side, careful stock management to ensure nothing went out of date, and have a mix of ready made baguettes that people could eat and take away, as well as hot food. Focus on popular dishes such as tapas, nachos, filled pita breads. Very important not to waste food.
Fresh lovely cakes. Specialty teas, and good quality coffee.
Be prepared for the lunch time rush on a Friday!
Also, what has been very important for this cafe, has been the social media aspect. When we got involved they had only 32 "Likes". Every respondent to The questionnaire was entered into a prize draw where they won coffee and cake for two people, and they were asked to check Facebook to see the winner announced. This resulted in 200 "likes" within the week the questionnaire was out. So, using peer to peer marketing they announce changes to the menu, introduce new dishes with pictures of delicious food, events like "knitting evening" or "crocheting club", along with music and karaoke. People share this because they want to take their friends with them, and they now have a very active FB page where their customers are chatting to them, and help spreading what is on. The aim for the cafe is to have a minimum of one new dish, or event, or news to share per month of the year.
They are also building links with local tourist attractions, with links from their websites, and posters on the wall.