I estimated the numbers for the Agile user group based on my own attendance.  I don't have numbers for several other groups, but most data comes from Meetup.com.

The raw data:

	2014.01	2014.02	2014.03	2014.04	2014.05	2014.06
.Net	43	29	33	32	35
Adobe Design Group
Agile	30	30	30	30	30
Big Data		65	77		85	202
Code for America Brigade			12	6		11
Cowtown Computer Congress
Crowdfunding		40	22	22
DataScience	23			48	43
DevOps		33	16	17
Drupal KC
Girl Develop It			9	10
Google Developers	9	17		17	8
Internet of Things						11
iOS					6
Java	25	35	24	28	24	35
Kansas City Code Noobs
KC IIBA
KCDesignCore	28	58	36	32	26	30
Lambda Lounge	36	48	45	39	44
Lawrence Coders			6	6	10	4
Limited WIP/Lean			10	10	15
Microsoft Access
Mobile App Developers	27	28	37	45	39
Node	23	8	13	23	22
OWASP			30
Perl Mongers
PHP			8	26	5	15
Python	34	35	27	23	16
R	20	21	12	22	13
Rails	10		12	4	7
Ruby	27	24	32	33	30	24
SalesForce Developers				26
SecKC
Smarter Sharepoint
Startup Grind			3
Tech Happy Hour			9	17
UpFront KC	40	43
UXCore		30	24	20	22
Venture Lounge			114
Video Game Developers	11	8	9	8	8	4
Web Analytics
WebPros
WordPress	66	31	33	44	10	12