Here are some options, though, depending on the context:
Formal:
* Bar (refers to the legal profession as a whole)
* Bench (refers to judges, but could be used figuratively for lawyers)
* Congregation (if they are gathered for a specific purpose)
Informal:
* Group
* Team
* Squad
You could also use a creative, metaphorical term, like:
* A swarm of legal eagles
* A parliament of lawyers
* A jury of peers
Ultimately, the best choice depends on the specific situation and the tone you want to convey.