In many of the Prague metro stations there are pizza counters where for the equivalent of £1 you can buy a slice of pizza. The slices are huge and will for sure fill you up on the way home from a party.
If you are on the go and looking for something quick to eat then Country Life is the best place, it’s a chain located across the city and is a vegetarian’s dream.
They have a deli counter of hot and cold fresh vegetarian food, you pay by the weight of your plate. You can eat in or take away for a healthy, cheap and quick option.
Similar to Country Life, Dhaba Beas is a great vegetarian and vegan self-service deli. The food is all based on Indian, Thai, Vietnamese and Czech cuisine. It’s a great place to grab a quick bite to eat and costing only 22CZK (£0.70) for 100g of food you can’t complain!