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Casaro Osteria

2136 Union St, San Francisco, CA 94123
$$
Pizza, Cocktail Bars, Pizza

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Master Critic Review

Casaro Osteria 8.6
Cow Hollow
Buzzy Union Street osteria serving wood-fired, Neapolitan-style pies alongside antipasti and spritzes. It’s a polished, social room with walk-in energy and a popular midday happy hour.
Must-Try Dishes: Margherita, Diavola, Salsiccia e Funghi
Scores:
Value: 7.8 Service: 8.3 Consistency: 8.7 Food Quality: 9.2 Atmosphere: 8.8 Cultural Relevance: 8.4
What makes it special: Wood-blistered pies with a lively Union Street dining room and bar.
Who should go: Neapolitan pie fans and cocktail groups
When to visit: Late evening after 8:30pm or midday happy hour
What to order: Margherita; Diavola; Salsiccia e Funghi
Insider tip: On peak weekends they favor walk-ins—join the waitlist early.
Logistics & Planning
Parking: Mostly street parking—expect competition after 6pm; nearby garages on Union and Fillmore are reliable backup options.
Dress code: Smart casual; jeans and a button-down or dress work well for the buzzy crowd.
Noise level: Lively and energetic—conversation possible but elevated during peak dinner hours.
Weekend wait: 45–60 minutes without a reservation during prime hours.
Weekday lunch: Usually no wait, but limited midday seating near the bar.
Dietary Options
Vegetarian options: Yes—several vegetarian pizzas and antipasti options available.
Vegan options: Limited—no vegan cheese but vegetable-forward pizzas can be customized.
Gluten-free options: Not standard, but gluten-free crust occasionally available upon request.
Good to Know
Is this good for a first date? Yes—the wood-fired oven, warm lighting, and lively bar make it ideal for casual but romantic nights, especially on the patio or corner booths.
Can I get a table without a reservation? Yes, but plan to wait—walk-ins are common, especially for bar seating. Join the Yelp waitlist early on weekends.
Is it kid-friendly? Somewhat—kids are welcome during early hours, but the crowd trends adult after 7pm and the space can get loud.
Best For
Better for: Neapolitan-style pies with authentic wood-blistered crust and a social bar scene—more energy and cocktail focus than most pizza spots.
Skip if: You want a quiet meal or deep-dish pizza—the room is buzzy and designed for social dining rather than long, intimate conversations.