I have never ordered room service from the Yacht or Beach Club and I don't hear many review from guest who have, but I will post your question over on the resort FAQ thread (see the link in my signature) to see if anyone can give you feedback about the food from room service or perhaps offer other solutions.
I don't think you can order takeout from the resort lounges Martha's Vineyard, Ale & Compass or Crew's Cup Club), but I have heard people can sit down, order food and then ask that it be wrapped up. Even with service tip, it is possibly less expensive than the room service cost for a burger.
Here's a link to a menu for Crew's Cup at YC, which includes a burger.
https://www.wdwinfo.com/wdwinfo/dining/diningdetail.cfm?restaurant.id=324
From Yacht & Beach Club Dining Post (Page 1, Post 7)
Pizza Options at the Yacht & Beach Club:
1) Flatbreads are available in the Beach Club Marketplace which is open from 11 am until 11 pm. See photo above for picture of the flatbread.
2) The Yacht Club and Beach Club In-room Dining Service will deliver pizza to your room.
In Room Dining Menu Link- from allears website:
In Room Dining Menu
If you are on the dining plan, you may redeem 2 Adult Table Service Credits for 1 Pizza Entrée, 2 Single Serve Non-alcoholic Drinks and 2 Desserts. According to the dining plan brochure, gratuity is included.
IMHO, this is a relatively expensive way to satisfy your pizza craving!
3) The Boardwalk Pizza Take Out Window is a short walk or boat ride away, Open until Midnight! (Aug 2018):
Boardwalk Pizza Window Menu, 2018
4) Local pizza restaurants will deliver to the resort.
You will need to meet the delivery person in the lobby to pay for and pick up the food.
Here is a thread with pizza delivery information:
Pizza Delivery at Disney World
I have personally never ordered from any of the places listed, but these were a few area pizza restaurants recommended by posters on the thread:
Giordanos: (407) 397 0044
Westgate Pizza Hut: (866) 438-2507
Papa Johns: (352) 243-1800
Flipper's Pizza: (407) 938-9633
Under NO circumstances should you order from any place that slips flyers under the door of your resort room (at Disney or elsewhere).
This is a common scam where you are asked to provide your credit card number and you may be charged much more than you authorize.
Here is a compilation of comments about pizza delivery from April 2017
Pizza
Room Service:
New resort private dining hours effective October 29 2017
Disney's Yacht and Beach Club Resort
- Breakfast - 6am to noon
- All day dining - Noon to 11pm
- Late Night - 11pm to 2am
Source:
http://www.wdwmagic.com/resorts/wal...dining-at-walt-disney-world-resort-hotels.htm
In Room Dining Menu pictures, October 2019
In Room Dining Menu at Yacht & Beach Club