Little Venice London UK

The boats may be long, but they are known as narrowboats on the UK system- which may assist searches.

The wider beam boats are generally known as Dutch barges.

Here are a couple of examples- https://www.airbnb.co.uk/s/homes?account_id=142001801&campaign_id=380398296&ad_id=81501395802778&ad_group_id=1304021149769096&keyword_id=dat-2333301113236346%3Aloc-188&device=c&c=.pi2.pk380398296_1304021149769096&sem_automaid=true&gclid%5B%5D=ecea923bdbc416a47c4ff76598932868&gclid%5B%5D=ecea923bdbc416a47c4ff76598932868&gclsrc%5B%5D=3p.ds&gclsrc%5B%5D=3p.ds&msclkid=ecea923bdbc416a47c4ff76598932868&utm_source=bing&utm_medium=cpc&utm_campaign=GBR%3ADTM%3ADSA%3AGBR%2BP2Generic&utm_term=%2Frooms%2F&utm_content=P3%3A%2Frooms%2F&dynamic_product_ids%5B%5D=107051&omni_page_id=27964

And this one is a houseboat- another term to search for- https://www.bookahouseboat.com/rentals/london-england-uk-pretty-narrowboat-in-little-venice-london-596

I took a London Walks walking tour of Little Venice in 2022. There are definitely restaurants in the area. It was quite lively.

1. I've stayed on a narrowboat before. You yourself will be secure as the interior of the boat is lockable. Whether someone could climb onto the outside deck of the boat depends on whether you are staying in a secure marina or along the public towpath. I would definitely do it, especially if you can also take the boat out for a spin. We did two one-week excursions on the canals and it was one of the best travel things I ever did.

2. I can recommend Café Laville, located on a bridge over the Regent's Canal, where Edgware Road crosses. https://cafelaville.co.uk/

Hannah does Little Venice

https://www.youtube.com/watch?v=hGS8gLLIN4o

Danjan,
Our linked London TR foto essay below shows about a dozen images of Little Venice (plus pleeeeeenty more besides) starting at #22.
Safety seems not an issue there. An additional shot towards the end of that overlong TR features one of the actual boat lodgings.

Btw, demand for the best table at Cafe Laville (i.e. the one slightly jutting out at front) is high and we saw folks jockeying for it and trying to jump the queue.
Good Luck.
I am done. the waters
https://www.fodors.com/community/europe/back-to-brick-london-tr-w-fotos-1715655/page2